Gestural communication in wild spider monkeys (Ateles geoffroyi) by Felipe Villa-Larenas, Miquel Llorente, Katja Liebal, Federica Amici

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A first exploratory comparison of the behaviour of wolves (Canis lupus) and wolf-dog hybrids in captivity by Federica Amici, Simone Meacci, Emmeline Caray, Linda Oña, Katja Liebal, Paolo Ciucci

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GorillaFACS: The Facial Action Coding System for the Gorilla spp. by Catia Correia-Caeiro, Raquel Costa, Misato Hayashi, Anne Burrows, Jordan Pater, Takako Miyabe-Nishiwaki, Jack L Richardson, Martha M Robbins, Bridget Waller, Katja Liebal

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Adapting the facial action coding system for chimpanzees (Pan troglodytes) to bonobos (Pan paniscus): the ChimpFACS extension for bonobos by Catia Correia-Caeiro, Paul Henrik Kuchenbuch, Linda S. Oña, Franziska Wegdell, Maël Leroux, André Schuele, Jared Taglialatela, Simon Townsend, Martin Surbeck, Bridget M. Waller, Katja Liebal

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