Lemurs of Madagascar and the Comoros: Circadian distribution of Indri indri group vocalizations: a short sampling period at two study sites near Périnet, eastern Madagascar. Dodo 17: 19-27.

Literature

Authors(s)	Olivier, W. L. R. and O'Connor, S. M.
Year	1980
Title	Circadian distribution of Indri indri group vocalizations: a short sampling period at two study sites near Périnet, eastern Madagascar. Dodo 17: 19-27.