J. Guerra-M., J. Espinosa, J. Ceballos, and B. Checa, “BIOLOGY IMPACT OF THE APPLICATION OF INSECTICIDE ENDOSULFAN IN A MELON AGROECOSYSTEM. LOS SANTOS, PANAMA, 1996-1997.”, ciencia-agropecuaria, no. 11, pp. 57-73, Mar. 2002.