B. Van Caenegem, W. Van Parys, P. Demeester, E. Iannone, and F. Bentivoglio, "Internal Connectivity of Optical Crossconnects in Opaque Networks,"
in Optical Fiber Communication Conference and the International Conference on Integrated Optics and Optical Fiber Communication,
OSA Technical Digest Series
(Optical Society of America, 1999), paper TuK5.