Gasbarre, L.C., Smith, L.L., Pilitt, P.A. 2005. Identification of cattle nematode parasties resistant to multiple classes of anthelmintics in a commercial cattle population in the US [abstract]. American Association of Veterinary Parasitologists Proceedings. p. 57.
Gasbarre, L.C., Smith, L.L., Lichtenfels, J.R., Pilitt, P.A. 2004. The identification of cattle nematode parasites resistant to multiple classes of anthelmintics in a commercial cattle population in the U.S. [abstract]. American Association of Veterinary Parasitologists Proceedings.