1. Clos, C., A Study of Non-locking Switching Networks, Bell System Tech. J., 1953, vol. 32, pp. 406–424.
2. Benesh, V.E., Mathematical Theory of Connecting Networks and Telephone Traffic, New York: Academic, 1965. Translated under the title Matematicheskie osnovy teorii telefonnykh soobshchenii, Moscow: Svyaz’, 1968.
3. Pipenger, N., On Rearrangeable and Non-blocking Switching Networks, J. Comput. Syst. Sci., 1978, vol. 17, pp. 307–311.
4. Hall, M., Combinatorial Theory, Waltham: Blaisdell, 1967. Translated under the title Kombinatorika, Moscow: Mir, 1970.
5. Podlazov, V.S. and Sokolov, V.V., Method of Uniform Extension of System Networks in Multiprocessor Computer Systems, Probl. Upravlen., 2007, no. 1, pp. 22–27.