Clark Arcadi, A; Robert, D; Mugurusi, F (2004). "A comparison of buttress drumming by male chimpanzees from two populations". Primates; Journal of Primatology. 45 (2): 135–9. doi:10.1007/s10329-003-0070-8. PMID14735390. S2CID8141024.
Clark Arcadi, A; Robert, D; Mugurusi, F (2004). "A comparison of buttress drumming by male chimpanzees from two populations". Primates; Journal of Primatology. 45 (2): 135–9. doi:10.1007/s10329-003-0070-8. PMID14735390. S2CID8141024.
Weiss, Rick (July 5, 1994). "Music Therapy". The Washington Post. No. Jul 5, 1994. Archived from the original on February 10, 2013. Retrieved July 6, 2017.
Clark Arcadi, A; Robert, D; Mugurusi, F (2004). "A comparison of buttress drumming by male chimpanzees from two populations". Primates; Journal of Primatology. 45 (2): 135–9. doi:10.1007/s10329-003-0070-8. PMID14735390. S2CID8141024.
Weiss, Rick (July 5, 1994). "Music Therapy". The Washington Post. No. Jul 5, 1994. Archived from the original on February 10, 2013. Retrieved July 6, 2017.