Behavioral studies and veterinary management of orangutans at Bukit Merah Orang Utan Island, Perak, Malaysia
Primates, 59(2): 135-144
The first smile: spontaneous smiles in newborn Japanese macaques (Macaca fuscata)
Primates, Volume 58, Issue 1, pp 93-101
Perception of the average size of multiple objects in chimpanzees (Pan troglodytes)
Proceedings of the Royal Society B: Biological Sciences, 284(1861)
The higher the farther: distance-specific referential gestures in chimpanzees (Pan troglodytes)
Biology Letters, 13(11), 20170398
Smiles in the fetal period
Infant Behavior and Development, 35, 466-471
Origins of a theory of mind.
Infant Behavior & Development, 34, 264-269
Can we observe spontaneous smiles in 1-year-olds?
Infant Behavior and Development, 32(4): 416-421
Roots of smile: A preterm neonates' study.
Infant Behavior and Developme, 31:518-522