1. V. E. Benes. Mathematical Theory of Connecting Networks and Telephone Traffic. Academic Press, New York, 1965.
2. C. Clos. A study of non-blocking switch networks. Bell System Tech. J. 32:407–425, March 1953.
3. L. R. Goke and G. J. Lipovski. Banyan networks for partitioning multiprocessor System. In Proc. 1st Annual Symp. Comp. Arch'73, pp. 21–28, 1973.
4. Q.-P. Gu and S. Peng. Wavelengths requirement for permutation routing in all-optical multistage interconnection networks. In Proc. 2000 Int. Parallel and Distributed Processing Symp., pp. 761–768, Cancun, Mexico, 2000.
5. H. S. Hinton. A nonblocking optical interconnection network using directional couplers. In Proceedings of GLOBECOM (IEEE, 1984), pp. 885–889.