1. C. Cooper and I. N. Kovalenko, “Upper bound of the number of complete maps,” Teor. Imovirn. Mat. Stat., No. 53, 69–75 (1995).
2. I. N. Kovalenko, “Upper bound on the number of complete maps,” Kibern. Sist. Anal., No. 1, 81–85 (1996).
3. J. Denes and A. D. Keedwell, Latin Squares and Their Applications, English University Press, London (1974).
4. R. Konheim, Cryptography: A Primer, Wiley, Chichester (1991).
5. R. Hockings and S. Cheshire, Chelsea Football Club: The full statistical story 1905–1985, Ken Hockings, Middlesex.