1. B. J. Nebel, Environmental Science. The Way the World Works (Pearson Education, USA, 1997).
2. Y. D. Murray, Mathematical Biology (Springer, USA, 2009).
3. R. N. Ganikhodzhaev, ‘‘Quadratic stochastic operators, Lyapunov function and tournaments,’’ Sb. Math. 76, 489–506 (1993).
4. J. W. Moon, Topics on Tournaments (Rinehart and Winston, London, 2013).
5. F. Harary, Theory of Matrices (Fizmatlit, Moscow, 2010) [in Russian].