@article {309969, title = {Development of social cognition in infant chimpanzees (Pan troglodytes): Face recognition, smiling, gaze, and the lack of triadic interactions}, journal = {Japanese Psychological Research}, volume = {46}, year = {2004}, pages = {227{\textendash}235}, author = {Masaki Tomonaga and Masayuki Tanaka and Tetsuro Matsuzawa and Masako Myowa-Yamakoshi and Daisuke Kosugi and Yuu Mizuno and Sanae Okamoto and Masami K Yamaguchi and Kim A Bard} }