Grimmer , E.D., I.F. Canisso, S.H. Hsiao, and E.F. Garrett. 2017. “Squamous Cell Carcinoma and Papilloma Virus in the Prepuce of a Boer Buck”. Clinical Theriogenology 9 (4):595-99. https://clinicaltheriogenology.net/index.php/CT/article/view/10008.