C. K. Chan, F. Tong, L. K. Chen, and K. W. Cheung, "Demonstration of an add-drop network node with time slot access for high-speed WDMA dual bus/ring packet networks,"
in Optical Fiber Communication Conference,
Vol. 2 of 1998 OSA Technical Digest Series
(Optical Society of America, 1998), paper TuJ5.