Patrik Lindenfors et al. (2007).
11
Packer quoted in Erin Biba (2019).
12
Frans de Waal (2019); Chapter 9.
13
Christophe Boesch et al. (2010); Chapter 11.
14
C. Shoard, Meryl Streep: «We hurt our boys by calling something "toxic masculinity,"»
15
Frans de Waal (1995).
16
David Attenborough narrates a night out in Banff, May 15, 2015, www.youtube.com/watch?v=HbxYvYxSSDA.
17
Judith Butler (1988), p. 522.
18
Vera Regitz-Zagrosek (2012); Larry Cahill, ed., An issue whose time has come: Sex/gender influences on nervous system function,
19
Robert Mayhew (2004), p. 56.
20