Salmon SA, Watts JL, Yancey RJ. In vitro activity of ceftiofur and its primary metabolite, desfuroylceftiofur, against organisms of veterinary importance. Journal of Veterinary Diagnostic Investigation. July 1996, 8 (3): 332–336. PMID 8844576. doi:10.1177/104063879600800309.
Salmon SA, Watts JL, Yancey RJ. In vitro activity of ceftiofur and its primary metabolite, desfuroylceftiofur, against organisms of veterinary importance. Journal of Veterinary Diagnostic Investigation. July 1996, 8 (3): 332–336. PMID 8844576. doi:10.1177/104063879600800309.