YAMANASHI, Yumi; MATSUNAGA, Masayuki; SHIMADA, Kanae; KADO, Ryuichiro; TANAKA, Masayuki. Introducing tool-based feeders to zoo-housed chimpanzees as a cognitive challenge: spontaneous acquisition of new types of tool use and effects on behaviours and use of space. Journal of Zoo and Aquarium Research, [S. l.], v. 4, n. 3, p. 147–155, 2016. DOI: 10.19227/jzar.v4i3.235. Disponível em: https://jzar.org/jzar/article/view/235. Acesso em: 24 apr. 2024.