Pope, R.D. (1981): ' Rhyzobius ventralis' (Coleoptera: Coccinellidae), its constituent species, and their taxonomy and historical roles in biological control - Bull. ent. Res. 71: 19-31 >>>https://www.zin.ru/animalia/coleoptera/ADDPAGES/Andrey_Ukrainsky_Library/References_files/Pope81.pdf oder >>>"F:\TAXA\coleo\Scans\Pope1981 Rhyzobius.pdf"