@article{haven_wichtel_bristol_fetrow_spears_1992, title={The effects of antibiotic prophylaxis on postoperative complications after rumenotomy in cattle}, volume={200}, number={9}, journal={Journal of the American Veterinary Medical Association}, author={Haven, M. L. and Wichtel, J. J. and Bristol, D. G. and Fetrow, J. F. and Spears, J. W.}, year={1992}, pages={1332–1335} }
 @article{witchel_whitlock_1991, title={Botulism associated with feeding alfalfa hay to horses}, volume={199}, number={4}, journal={Journal of the American Veterinary Medical Association}, author={Witchel, J. L. and Whitlock, R. H.}, year={1991}, pages={471} }