M. F. BARBERENA and A. C. BELLOTTI, “Parasitism of two strains of Heterorhabditis bacteriophora on the subterranean burrowing bug Cyrtomenus bergi (Hemiptera: Cydnidae)”, Rev. Colomb. Entomol., vol. 24, no. 1, pp. 7–11, Jun. 1998.