(2009) „Bos grunniens and Bos mutus (Artiodactyla: Bovidae)”. Mammalian Species836, 1–17. o. DOI:10.1644/836.1.
(2004) „The naming of wild animal species and their domestic derivatives”. Journal of Archaeological Science31 (5), 645. o. DOI:10.1016/j.jas.2003.10.006.