Alcalá-Canto, Y., Sumano-López, H.S., Ocampo-Camberos, L., Gutiérrez, L. and Tapia-Pérez, G. 2016. Anthelmintic resistance status of gastrointestinal nematodes of sheep to the single or combined administration of benzimidazoles and closantel in three localities in Mexico. Veterinaria México OA. 3, 4 (Dec. 2016). DOI:https://doi.org/10.21753/vmoa.3.4.374.