Berry, S. L.; Graham, T. W.; Mongini, A.; Arana, M. The Efficacy of Serpens Spp Bacterin Combined With Topical Administration of Lincomycin Hydrochloride for Treatment of Papillomatous Digital Dermatitis (footwarts) in Cows on a Dairy in California. Bov. pract. 1999, 33, 6-11.