1. Altmann J (1974) Observational study of behavior: sampling methods. Behaviour 49:227–267
2. Altmann J (1980) Baboon mothers and infants. Harvard University Press, Cambridge
3. Anderson DP, Nordheim EV, Boesch C, Moermond TC (2002) Factors Influencing fission-fusion grouping in chimpanzees in the Taï Forest, Côte d’Ivoire. In: Boesch C, Hohmann G, Marchant LF (eds) Chimpanzee behavioural diversity. Cambridge University Press, Cambridge
4. Anderson DP, Nordheim EV, Bi ZBG, Boesch C (2005) Deviations in tropical tree phenology patterns caused by climatic variables. Biotropica (in press).
5. Bercovitch FB (1987) Female weight and reproductive condition in a population of olive baboons(Papio cynocephalus anubis). Am J Primatol 12:189–195