R. Ramírez Romero, B. Chavarría Martínez, A. López Mayagoitia, L. E. Rodrígez Tovar, and A. M. Nevaréz Garza, “Presence of bovine virus diarrhea in association with other pathologies in feedlot cattle”, Vet Mex OA, vol. 43, no. 3, Aug. 2013.