Adrienne Zihlman et al. (1978).
161
Jacques Vauclair and Kim Bard (1983).
162
Stephen Jay Gould (1977); Robert Bednarik (2011).
163
Frans de Waal (1989).
164
Elisabetta Palagi and Elisa Demuru (2017).
165
Sven Grawunder et al. (2018).
166
Eduard Tratz and Heinz Heck (1954), p. 99 (перевод с нем).
167
Kay Prüfer et al. (2012).
168
Nick Patterson et al. (2006); см.: Masato Yamamichi et al. (2012).
169
Harold Coolidge (1933), p. 56; Rui Diogo et al. (2017).
170