A. M. GUEVARA-R., R. CARDENAS-M., E. C. MONTOYA-R., and A. MADRIGAL-C., “Population increase of the coffee bit, Hypothenemus hampei (Ferrari), related to the development of the coffee fruit”, Rev. Colomb. Entomol., vol. 21, no. 3, pp. 145–152, Sep. 1995.