Nunes, R.V., Carvalho, M.S.G. & Vaz-De-Mello, F.Z. (2016) Taxonomic review of the Dichotomius (Luederwaldtinia) assifer (Eschscholtz) species-group (Coleoptera: Scarabaeidae). Zootaxa, 4078 (1), 230–244.