Boesch, C, Kalan, AK, Mundry, R, Arandjelovic, M, Pika, S, Dieguez, P, Ayuk Ayimisin, E, Barciela, A, Coupland, C, Ebot Egbe, V, Eno-Nku, M, Fay, JM, Fine, D, Hernandez Aguilar, RA, Hermans,, V, Kadam, P, Kambi, M, Llana, M, Maretti, G, Morgan, D et al, Murai, M, Neil, E, Nicholl, S, Ormsby, LJ, Orume, R, Pacheco, L, Piel, AK, Sanz, C, Sciaky, L, Stewart, FA, Tagg, N, Wessling, EG, Willie, J and Kühl, HS (2020) Chimpanzee Ethnography Reveals Unexpected Cultural Diversity. Nature Human Behaviour. ISSN 2397-3374

Froehlich, M, Kuchenbuch, P, Mueller, G, Fruth, B, Furuichi, T, Wittig, RM and Pika, S (2016) Unpeeling the layers of language: Bonobos and chimpanzees engage in cooperative turn-taking sequences. Scientific Reports, 6. ISSN 2045-2322