De Bonis, L.; Peigné, S.; Likius, A.; MacKaye, H.T.; Vignaud, P.; Brunet, M. (2007). "The oldest African fox (Vulpes riffautae n. sp., Canidae, Carnivora) recovered in late Miocene deposits of the Djurab desert, Chad". Naturwissenschaften. 94 (7): 575–580. doi:10.1007/s00114-007-0230-6. PMID17361401.