The first smile: spontaneous smiles in newborn Japanese macaques (Macaca fuscata)

MaqFACS(Macaque Facial Action Coding System) can be used to document facial movements in Barbary macaques (Macaca sylvanus)

(2015) Églantine Julle-Danière et al.   PeerJ

Chimpanzees (Pan troglodytes) Produce the Same Types of ‘Laugh Faces’ when They Emit Laughter and when They Are Silent

(2015) Marina Davila-Ross et al.   PLoS One

Playing with the face: Playful facial “chattering” and signal modulation in a monkey species (Theropithecus gelada).

(2011) Elisabetta Palagi et al.   JOURNAL OF COMPARATIVE PSYCHOLOGY

Brief communication: MaqFACS: A muscle-based facial movement coding system for the rhesus macaque

(2010) L.A. Parr et al.   AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY

Phylogeny of the macaques (Cercopithecidae: Macaca) based on Alu elements

(2009) Jing Li et al.   GENE

Facial musculature in the rhesus macaque (Macaca mulatta): evolutionary and functional contexts with comparisons to chimpanzees and humans

(2009) Anne M. Burrows et al.   JOURNAL OF ANATOMY