Wilson, J.M.; et al. (1989). "Ecology and Conservation of the Crowned Lemur at Ankarana, N. Madagascar with notes on Sanford's Lemur, Other Sympatrics and Subfossil Lemurs". Folia Primatologica. 52 (1–2): 1–26. doi:10.1159/000156379. PMID2807091.
Wilson, J.M.; et al. (1989). "Ecology and Conservation of the Crowned Lemur at Ankarana, N. Madagascar with notes on Sanford's Lemur, Other Sympatrics and Subfossil Lemurs". Folia Primatologica. 52 (1–2): 1–26. doi:10.1159/000156379. PMID2807091.