M. J. Corbin, J. A. Gould, B. L. Carter, D. G. McClary, and T. A. Portillo, “Effects and economic implications of metaphylactic treatment of feeder cattle with two different dosages of tilmicosin on the incidence of bovine respiratory disease (BRD): A Summary of Two Studies”, Bov. pract., vol. 43, no. 2, pp. 140–152, Jun. 2009.