Abid AL-Redah, Sameer A., and Neeran F. Hassan. “Efficacy of Tramadol As Analgesic and Mixed With Ketamine, Xylazine As Anesthetic in Rabbits”. Kufa Journal For Veterinary Medical Sciences, vol. 2, no. 1, June 2011, pp. 1-11, doi:10.36326/kjvs/2011/v2i14039.