ROMERO-NASAYO, A.; BENAVIDES-ORTIZ, E.; HERRERA-GONZÁLEZ, C.; PARRA-TRUJILLO, M. H. Resistance of the Tick Boophilus Microplus to Organophosphate and Synthetic Pyrethroid Acaricides in the Department of Huila. Rev. Colomb. Entomol. 1997, 23, 9-17.