Britt, Jenks S., Steven L. Berry, Jan Shearer, Tom Hemling, Barry Steevens, and Monika Dreher. 1999. “A Uniform Protocol for Evaluating Response to Treatment of Papillomatous Digital Dermatitis Lesions”. The Bovine Practitioner 33 (2):149-54. https://doi.org/10.21423/bovine-vol33no2p149-154.