“Analgesic Evaluation of Methadone, in Two Doses Associated With Lidocaine Without Vasoconstrictor, Epidurally in Dogs Submitted to Elective Orchiectomy”. Pubvet 14, no. 10 (October 8, 2020). Accessed May 20, 2024. http://ojs.pubvet.com.br/index.php/revista/article/view/339.