Tarasov, S. I. and Kabakov, O. N. (2010) “Two new species of Onthophagus (Coleoptera: Scarabaeidae) from Indochina, with a discussion of some problems with the classification of Serrophorus and similar subgenera”, Zootaxa. Auckland, New Zealand, 2344(1), pp. 17–28. doi: 10.11646/zootaxa.2344.1.2.