M. D. P. NARVÁEZ-G, M. T. GONZÁLEZ-G., A. E. BUSTILLO-P., B. CHAVES-C., and E. C. MONTOYA-R., “Spores production of Beauveria bassiana y Metarhizium anisopliae isolates in different sustrates”, Rev. Colomb. Entomol., vol. 23, no. 2, pp. 125–131, Jul. 1997.