J. Koman

Social structure and dynamics of wild chimpanzees at Bossou, Guinea

Y. Sugiyama, J. Koman, 1979, Primates.

A preliminary list of chimpanzees' alimentation at Bossou, Guinea

Y. Sugiyama, J. Koman, 2006, Primates.

The Flora of Bossou: Its Utilization by Chimpanzees and Humans

Y. Sugiyama, J. Koman, 1992 .

Ant-catching wands of wild chimpanzees at Bossou, Guinea.

Y. Sugiyama, J. Koman, M. Sow, 1988, Folia primatologica; international journal of primatology.

Tool-using and -making behavior in wild chimpanzees at Bossou, Guinea

Yukimaru Sugiyama, Y. Sugiyama, J. Koman, 1979, Primates.