Takeshi Furuichi (2019).
181
Martin Surbeck and Gottfried Hohmann (2013).
182
Takeshi Furuichi et al. (2014).
183
Frans de Waal (2016).
184
Natalie Angier (1997).
185
Martin Surbeck et al. (2017).
186
Gottfried Hohmann and Barbara Fruth (2011); Nahoko Tokuyama and Takeshi Furuichi (2017); Tokuyama et al. (2019).
187
Takeshi Furuichi (2019), p. 62.
188
Benjamin Beck (2019).
189
Sydney Richards, Primate heroes: PASA"s amazing women leaders, Pan African Sanctuary Alliance, n. d., pasa.org/awareness/primate-heroes-pasas-amazing-women-leaders.
190