О природе смеха - В. И. Зазыкин

de Waal 1989 — Waal F. B. M. de (Frans B. M.) Peacemaking Among Primates. Cambridge (MA); L., 1989.

de Waal 1998 — Waal F. B. M. de (Frans B. M.) Chimpanzee Politics: Power and Sex Among Apes. Baltimore, 1998.

Walters 1988 — Walters M. J. The Dance of Life: Courtship in the Animal Kingdom. N.Y., 1988.

Yerkes 1929 — Yerkes R. M., Yerkes A. W. The Great Apes: A Study of Anthropoid Life. L., 1929.

Yerkes, Learned 1925 — Yerkes R. M., Learned B. W. Chimpanzee Intelligence and it’s Vocal Expressions. Baltimore, 1925.