Edmonds, M. D., E. G. Johnson, and J. D. Edmonds. “Feedlot Gastrointestinal Parasite Control and Anthelmintic Treatment Options, a Review”. The Bovine Practitioner, vol. 47, no. 2, June 2013, pp. 120-3, doi:10.21423/bovine-vol47no2p120-123.