Winter, D. C., et al. “Analgesic Effect of Epidural Anesthesia With Tramadol Hydrochloride in Rabbits Submitted to Implants of Manioc Starch Blends and Polyvinyl Alcohol”. Scientific Electronic Archives, vol. 11, nº 3, junho de 2018, p. 52-60, doi:10.36560/1132018499.