| 
Citations
 | 
   web
Boesch C, & Boesch H. (1984). Possible causes of sex differences in the use of natural hammers by wild chimpanzees. J. Hum. Evol., 13, 415.
toggle visibility
Galdikas BMF. (1982). Orang-utan tool-use in Tanjung Puting Reserve, Central Borneo (Kalimantan Tengah). J. Hum. Evol., 10, 19.
toggle visibility
Kortlandt A. (1986). The use of tools by wild-living chimpanzees and earliest hominids. J. Hum. Evol.,, 15, 77.
toggle visibility
McGrew WC. (1974). Tool use by wild chimpanzees in feeding upon driver ants. J. Hum. Evol., 3, 501.
toggle visibility
Nishida T, & Hiraiwa M. (1982). Natural history of tool-using behavior by wild chimpanzees in feeding upon wood-boring ants. J. Hum. Evol., 11, 73.
toggle visibility
Povinelli DJ. (1987). Monkeys, apes, mirrors and minds: the evolution of self-awareness in primates. J. Hum. Evol., 2, 493.
toggle visibility