1. Erthygl › Ymchwil › Adolygwyd gan gymheiriaid
2. Cyhoeddwyd

   13.625 Gb/s real-time dual-band adaptive optical orthogonal frequency division multiplexing transmissions over 25 km standard single-mode fibre intensity modulation and direct detection systems utilising strongly saturated reflective semiconductor optical amplifier intensity modulators

   Tang, J., Zhang, Q., Hugues-Salas, E., Giddings, R. P., Zhang, J., Wang, M. & Tang, J. M., 1 Hyd 2014, Yn: IET Optoelectronics. 8, 5, t. 175-180

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

3. Cyhoeddwyd

   25.25-Gb/s Real-Time Multi-Band Optical OFDM Transmission Over 300-m MMFs With IQ Modulated Passband

   Giddings, R. P., Hugues-Salas, E., Zhang, Q. W., Zhang, J. J., Wang, M. & Tang, J. M., 2013, Yn: IEEE Photonics Technology Letters. 25, 21, t. 2123-2125 3 t.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

4. Cyhoeddwyd

   A Clock-gating-based Energy-efficient Scheme for ONUs in Real-time IMDD OFDM-PONs

   Zhang, J., Zhao, J., Huang, H., Ye, N., Giddings, R., Li, Z., Qin, D., Zhang, Q. & Tang, J., 15 Gorff 2020, Yn: Journal of Lightwave Technology. 38, 14, t. 3573-3583

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

5. Cyhoeddwyd

   A Point-to-multipoint Flexible Transceiver for Inherently Hub-and-Spoke IMDD Optical Access Networks

   Chen, L., Jin, W., He, J., Giddings, R., Huang, Y. & Tang, J., 15 Gorff 2023, Yn: Journal of Lightwave Technology. 41, 14, t. 4743-4754 12 t.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

6. Cyhoeddwyd

   Adaptability-enabled record-high and robust capacity-versus-reach performance of real-time dual-band optical OFDM signals over various OM1/OM2 MMF systems invited]

   Hugues-Salas, E., Zhang, Q., Giddings, R. P., Wang, M. & Tang, J., 2013, Yn: IEEE Journal of Optical Communications and Networking. 5, 10, A1-A11.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

7. Cyhoeddwyd

   Adaptive Hybrid Iterative Linearization Algorithms for IM/DD Optical Transmission Systems

   Hu, S., Zhang, J., Tang, J., Jin, T., Lin, H., Jin, W., Yu, Z., Giddings, R. & Qiu, K., 15 Gorff 2023, Yn: Journal of Lightwave Technology. 41, 14, t. 4644-4654 11 t.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

8. Cyhoeddwyd

   Adaptively modulated optical OFDM modems utilizing RSOAs as intensity modulators in IMDD SMF transmission systems.

   Tang, J., Wei, J. L., Hamie, A., Giddings, R. P., Hugues-Salas, E., Zheng, X., Mansoor, S. P. & Tang, J. M., 8 Ebr 2010, Yn: Optics Express. 18, 8, t. 8556-8573

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

9. Cyhoeddwyd

   Analytical Solution of Stage-dependent Bit Resolution of Full Parallel Variable Point FFTs for Real-time DSP Implementation

   Zhang, J., Wang, J., Giddings, R., Zhang, Q., Peng, J., Chen, J. & Tang, J., 15 Tach 2018, Yn: Journal of Lightwave Technology. 36, 22, t. 5177-5187

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

10. Cyhoeddwyd

    Colourless adaptively modulated optical OFDM transmitters using SOAs as intensity modulators.

    Tang, J., Wei, J. L., Yang, X. L., Giddings, R. P. & Tang, J. M., 25 Mai 2009, Yn: Optics Express. 17, 11, t. 9012-9027

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

11. E-gyhoeddi cyn argraffu

    Concurrent Direct Inter-ONU and Upstream Communications in IMDD PONs Incorporating P2MP Flexible Optical Transceivers and Advanced Passive Remote Nodes

    Jin, W., Chen, L., He, J., Giddings, R., Huang, Y., Hao, M., Faruk, M. S., Yi, X., Wang, T. & Tang, J., 30 Hyd 2024, (E-gyhoeddi cyn argraffu) Yn: Photonics. 11, 11, 1021.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

12. Cyhoeddwyd

    Concurrent Inter-ONU Communications for Next Generation Mobile Fronthauls based on IMDD Hybrid SSB OFDM-DFMA PONs

    Zhong, Z., Jin, W., Jiang, S., He, J., Chang, D., Hong, Y., Giddings, R., Jin, X., O'Sullivan, M., Durrant, T., Trewern, J., Mariani, G. & Tang, J., 1 Rhag 2021, Yn: Journal of Lightwave Technology. 39, 23, t. 7360-7369

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

13. Cyhoeddwyd

    DFT-Spread Spectrally Overlapped Hybrid OFDM-Digital Filter Multiple Access IMDD PONs

    Sankoh, A., Jin, W., Zhong, Z., He, J., Hong, Y., Giddings, R. & Tang, J., 2 Medi 2021, Yn: Sensors. 21, 17, 5903.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

14. Cyhoeddwyd

    DSP-Based Physical Layer Security for Coherent Optical Communication Systems

    Giddings, R., He, J., Tang, J. & Jin, W., Hyd 2022, Yn: IEEE Photonics Journal. 14, 5

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

15. Cyhoeddwyd

    DSP-Enabled Flexible ROADMs without Optical Filters and O-E-O Conversions

    Dong, Y., Tang, J., Jin, W., Duan, X., Dong, Y. X., Cao, B. Y., Giddings, R. P., Zhang, C. F., Qiu, K. & Tang, J. M., 20 Awst 2015, Yn: Journal of Lightwave Technology. 33, 19, t. 4124-4131

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

16. Cyhoeddwyd

    DSP-enabled reconfigurable and transparent spectral converters for converging optical and mobile fronthaul/backhaul networks

    Mao, M. Z., Giddings, R., Cao, B. Y., Xu, Y. T., Wang, M. & Tang, J., 9 Meh 2017, Yn: Optics Express. t. 13836-13856

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

17. Cyhoeddwyd

    Data-aided Iterative Algorithms for Linearizing IM/DD Optical Transmission Systems

    Hu, S., Zhang, J., Tang, J., Jin, W., Giddings, R. & Qiu, K., 1 Mai 2021, Yn: Journal of Lightwave Technology. 39, 9, t. 2864 - 2872 9 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

18. Cyhoeddwyd

    Digital Filter Multiple Access PONs With DSP-Enabled Software Reconfigurability

    Bolea, M., Giddings, R. P., Bouich, M., Aupetit-Berthelemot, C. & Tang, J. M., 2015, Yn: IEEE Journal of Optical Communications and Networking. 7, 4, t. 215-222 8 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

19. Cyhoeddwyd

    Digital Orthogonal Filter-Enabled Optical OFDM Channel Multiplexing for Software-Reconfigurable Elastic PONs

    Tang, J., Bolea, M., Giddings, R. P. & Tang, J. M., 16 Ion 2014, Yn: Journal of Lightwave Technology. 32, 6, t. 1200-1206

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

20. Cyhoeddwyd

    Directly Modulated VCSEL-Based Real-Time 11.25-Gb/s Optical OFDM Transmission Over 2000-m Legacy MMFs

    Mansoor, S. P., Tang, J., Hugues-Salas, E., Jin, X. Q., Giddings, R. P., Hong, Y., Mansoor, S., Villafranca, A. & Tang, J. M., 1 Chwef 2012, Yn: IEEE Photonics Journal. 4, 1, t. 143-154

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

21. Cyhoeddwyd

    Error-Controlled Iterative Algorithms for Digital Linearization of IMDD-based Optical Fibre Transmission Systems

    Jin, X., Jin, W., Zhong, Z., Jiang, S., Raibhjandari, S., Hong, Y., Giddings, R. & Tang, J., 18 Gorff 2022, Yn: Journal of Lightwave Technology.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

22. Cyhoeddwyd

    Experimental Demonstration of Real-Time Optical OFDM Transmission at 11.25 Gb/s Over 500-m MMFs Employing Directly Modulated DFB Lasers

    Giddings, R. P., Hugues-Salas, E., Charbonnier, B. & Tang, J. M., 2011, Yn: IEEE Photonics Technology Letters. 23, 1, t. 51-53 3 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

23. Cyhoeddwyd

    Experimental Demonstration of Soft-ROADMs with Dual-Arm Drop Elements for Future Optical-Wireless Converged Access Networks

    Gonem, O., Giddings, R. & Tang, J., 15 Maw 2024, Yn: Journal of Lightwave Technology. 42, 6, t. 1773-1785 13 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

24. Cyhoeddwyd

    Experimental Demonstration of Upstream Transmission in Digital Filter Multiple Access PONs with Real-time Reconfigurable Optical Network Units

    Giddings, R., Duan, X., Mansoor, S. & Tang, J., 26 Ion 2017, Yn: IEEE Journal of Optical Communications and Networking. 9, 1, t. 45-52 7 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

25. Cyhoeddwyd

    Experimental Demonstration of a Real-Time Digital Filter Multiple Access PON with Low Complexity DSP-Based Interference Cancellation

    Al-Rawachy, E., Giddings, R. P. & Tang, J., 1 Medi 2019, Yn: Journal of Lightwave Technology. 37, 17, t. 4315-4329 14 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

26. Cyhoeddwyd

    Experimental Demonstrations of Hybrid OFDM-Digital Filter Multiple Access PONs

    Jin, W., Zhong, Z., He, J., Sankoh, A., Giddings, R., Hong, Y., Pierce, I., O'Sullivan, M., Laperle, C., Lee, J., Mariani, G., Durrant, T. & Tang, J., 1 Gorff 2020, Yn: IEEE Photonics Technology Letters. 32, 13, t. 751-754

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

27. Cyhoeddwyd

    Experimental Demonstrations of Matching Filter-free Digital Filter Multiplexed SSB OFDM IMDD Transmission Systems

    Zhong, Z., Jin, W., Dong, Y., Sankoh, A., He, J., Hong, Y., Giddings, R., Pierce, I., O'Sullivan, M., Lee, J., Mariani, G., Durrant, T. & Tang, J., Ebr 2021, Yn: IEEE Photonics Journal. 13, 2, 12 t., 7900512.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

28. Cyhoeddwyd

    Experimental demonstration and optimisation of a synchronous clock recovery technique for real-time end-to-end optical OFDM transmission at 11.25Gb/s over 25km SSMF

    Tang, J., Giddings, R. P. & Tang, J. M., 28 Ion 2011, Yn: Optics Express. 19, 3, t. 2831-2845

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

29. Cyhoeddwyd

    Experimental demonstration of a DSP-based cross-channel interference cancellation technique for application in digital filter multiple access PONs

    Giddings, R., Al-Rawachy, E. & Tang, J., 14 Chwef 2017, Yn: Optics Express. 25, 4, t. 3850-3862 13 t., 270560.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

30. Cyhoeddwyd

    Experimental demonstration of a record high 11.25Gb/s real-time optical OFDM transceiver supporting 25km SMF end-to-end transmission in simple IMDD systems

    Giddings, R. P., Jin, X. Q., Hugues-Salas, E., Giacoumidis, E., Wei, J. L. & Tang, J., 1 Maw 2010, Yn: Optics Express. 18, 6, t. 5541-5555

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

31. Cyhoeddwyd

    Experimental demonstration of real-time 3Gb/s optical OFDM transceivers.

    Tang, J., Giddings, R. P., Jin, X. Q. & Tang, J. M., 14 Medi 2009, Yn: Optics Express. 17, 19, t. 16654-16665

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

32. Cyhoeddwyd

    Experimental demonstration of record high 19.125Gb/s real-time end-to-end dual-band optical OFDM transmission over 25km SMF in a simple EML-based IMDD system

    Giddings, R. P., Hugues-Salas, E. & Tang, J., 23 Awst 2012, Yn: Optics Express. 20, 18, t. 20666-20679

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

33. Cyhoeddwyd

    Experimental demonstrations and extensive comparisons of end-to-end real-time optical OFDM transceivers with adaptive bit and/or power loading

    Tang, J., Jin, X. Q., Wei, J. L., Giddings, R. P., Quinlan, T., Walker, S. & Tang, J. M., 1 Meh 2011, Yn: IEEE Photonics Journal. 3, 3, t. 500-511

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

34. Cyhoeddwyd

    Experimental demonstrations of 30Gb/s/λ digital orthogonal filtering-multiplexed multiple channel transmissions over IMDD PON systems utilizing 10G-class optical devices

    Deng, M., Sankoh, A., Giddings, R. & Tang, J., 25 Medi 2017, Yn: Optics Express. 25, 20, t. 24251-24261

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

35. Cyhoeddwyd

    Experimental demonstrations of DSP-enabledflexibility, adaptability and elasticity ofmulti-channel >72Gb/s over 25 km IMDDtransmission systems

    Jin, W., Zhong, Z., Jiang, S., He, J., Hu, S. H., Chang, D., Giddings, R., Hong, H., Jin, X., O'Sullivan, M., Durrant, T., Trewern, J., Mariani, G. & Tang, J., 30 Tach 2021, Yn: Optics Express. 29, 25, t. 41363-41377

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

36. Cyhoeddwyd

    Experimental demonstrations of record high REAM intensity modulator-enabled 19.25Gb/s real-time end-to-end dual-band optical OFDM colorless transmissions over 25km SSMF IMDD systems

    Zhang, Q. W., Hugues-Salas, E., Giddings, R. P., Wang, M. & Tang, J. M., 2013, Yn: Optics Express. 21, 7, t. 9167-9179 13 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

37. Cyhoeddwyd

    First experimental demonstration of 6Gb/s real-time optical OFDM transceivers incorporating channel estimation and variable power loading.

    Tang, J., Giddings, R. P., Jin, X. Q. & Tang, J. M., 1 Hyd 2009, Yn: Optics Express. 17, 22, t. 19727-19738

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

38. Cyhoeddwyd

    First real-time experimental demonstrations of 11.25Gb/s optical OFDMA PONs with adaptive dynamic bandwidth allocation

    Tang, J., Jin, X. Q., Hugues-Salas, E., Giddings, R. P., Wei, J. L., Groenwald, J. & Tang, J. M., 3 Hyd 2011, Yn: Optics Express. 19, 21, t. 20557-20570

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

39. Cyhoeddwyd

    Hybrid DFT-spread OFDM-Digital Filter Multiple Access PONs for Converged 5G Networks

    Dong, Y. X., Jin, W., Giddings, R. P., O'Sullivan, M., Tipper, A., Durrant, T. & Tang, J. M., Gorff 2019, Yn: IEEE Journal of Optical Communications and Networking. 11, 7, t. 347-353

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

40. Cyhoeddwyd

    Hybrid OFDM-Digital Filter Multiple Access PONs

    Dong, Y., Giddings, R. P. & Tang, J., 1 Rhag 2018, Yn: Journal of Lightwave Technology. 36, 23, t. 5640-5649

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

41. Cyhoeddwyd

    Hybrid OFDM-Digital Filter Multiple Access PONs Utilizing Spectrally Overlapped Digital Orthogonal Filtering

    Sankoh, A., Jin, W., Zhong, Z., He, J., Hong, Y., Giddings, R., Pierce, I., O'Sullivan, M., Lee, J., Durrant, T. & Tang, J., Hyd 2020, Yn: IEEE Photonics Journal. 12, 5, 10 t., 7905311.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

42. Cyhoeddwyd

    Hybrid SSB OFDM-Digital Filter Multiple Access PONs

    Jin, W., Sankoh, A., Dong, Y., Giddings, R., O'Sullivan, M., Durrant, T., Lee, J. & Tang, J., 15 Ebr 2020, Yn: Journal of Lightwave Technology. 38, 8, t. 2095 - 2105

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

43. Cyhoeddwyd

    Improved Performance Robustness of DSP-Enabled Flexible ROADMs Free from Optical Filters and O-E-O Conversions

    Jin, W., Zhang, C., Duan, X., Kadhum, M. R., Dong, Y. X., Giddings, R. P., Jiang, N., Qiu, K. & Tang, J. M., 1 Awst 2016, Yn: IEEE Journal of Optical Communications and Networking. 8, 8, t. 521-529 9 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

44. Cyhoeddwyd

    Intra-Cavity Chromatic Dispersion Impacts on 10-Gb/s Optical OFDM Transmissions Over 25-km Dual-RSOA-Based Self-Seeded PON Systems

    Tang, J., Deng, M. L., Cao, B. Y., Giddings, R. P., Dong, Y. X., Jiang, N., Nesset, D., Qiu, K. & Tang, J. M., 18 Rhag 2014, Yn: IEEE Photonics Journal. 7, 1

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

45. Cyhoeddwyd

    Low-complexity modulation format identification based on am- 2 plitude histogram distributions for digital coherent receivers

    Hao, M., Jiang, X., Xiong, X., Giddings, R., He, W. & Tang, J., 20 Ebr 2023, Yn: Photonics.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

46. Cyhoeddwyd

    Multi-Constraint Gerchberg-Saxton Iteration Algorithms for Linearizing IM/DD Transmission Systems

    Hu, S., Zhang, J., Tang, J., Jin, T., Jin, W., Liu, Q., Zhong, Z., Giddings, R., Hong, Y., Xu, B., Yi, X. & Qiu, K., 14 Maw 2022, Yn: Optics Express. 30, 6, t. 10019-10031 13 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

47. Cyhoeddwyd

    Multi-Level Subcarrier Index-Power Modulated Optical OFDM with Adaptive Bit Loading for IMDD PON Systems

    Al Halabi, F., Chen, L., Giddings, R., Tang, J. & Hamie, A., 11 Tach 2016, Yn: IEEE Photonics Journal. 99

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

48. Cyhoeddwyd

    Multiple Channel Interference Cancellation of Digital Filter Multiple Access PONs

    Dong, Y., Al-Rawachy, E., Giddings, R. P., Jin, W., Nesset, D. & Tang, J., Ion 2017, Yn: Journal of Lightwave Technology. 35, 1, t. 34-44

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

49. Cyhoeddwyd

    Negative power penalties of optical OFDM signal transmissions in directly modulated DFB laser-based IMDD systems incorporating negative dispersion fibers.

    Tang, J., Zheng, X., Jin, X. Q., Giddings, R. P., Wei, J. L., Hugues-Salas, E., Hong, Y. & Tang, J. M., 1 Awst 2010, Yn: IEEE Photonics Journal. 2, 4, t. 532-542

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

50. Cyhoeddwyd

    Performance Tolerance of IMDD DFMA PONs to Channel Frequency Response Roll-off

    Giddings, R., Duan, X., Mansoor, S. & Tang, J., 1 Hyd 2017, Yn: IEEE Photonics Technology Letters. 29, 19, t. 1655-1658 4 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

51. Cyhoeddwyd

    REAM intensity modulator-enabled 10Gb/s colorless upstream transmission of real-time optical OFDM signals in a single-fiber-based bidirectional PON architecture

    Hugues-Salas, E., Giddings, R. P., Jin, X. Q., Hong, Y., Quinlan, T., Walker, S. & Tang, J. M., 2012, Yn: Optics Express. 20, 19, t. 21089-21100 12 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid