1. Bang-Jensen J., Gutin G. Digraphs: Theory, Algorithms and Applications. Springer, London, 2000
2. Guo, Y., Volkmann, L. Cycles in multipartite tournaments. J. Combin. Theory, Ser. B, 62: 363–366 (1994)
3. Gutin, G., Rafiey, A. Multipartite tournaments with small number of cycles. Australas. J. Combin., 34: 17–21 (2006)
4. Las Vergnas, M. Sur le nombre de circuits dans un tornoi fortement connexe. Cahiers Centre Études Rech. Opér., 17: 261–265 (1975)
5. Moon, J.W. On subtournaments of a tournament. Canad. Math. Bull., 9: 297–301 (1966)