Template:Whitehead, 2019
- Whitehead, P.F. 2019. Distinguishing Omalium caesum Gravenhorst, 1806 and Omalium rugatum Mulsant & Rey, 1880 (Coleoptera: Staphylinidae, Omaliinae) by external features. Entomologist's gazette 70(3): 187–190. DOI: 10.31184/G00138894.703.1708
