Template:Richards, 1981
- Richards, A.M. 1981. Rhyzobius ventralis (Erichson) and R. forestieri (Mulsant) (Coleoptera: Coccinellidae), their biology and value for scale insect control. Bulletin of entomological research, 71 (1): 33–46. DOI: 10.1017/S0007485300051002