"Effects of Castration on Epidural Administration of Lidocaine-Tramadol in West African Dwarf (Wad) Goats". Nigerian Journal of Physiological Sciences, م 34, عدد 2, ديسمبر، 2019, ص 141-7, https://ojshostng.com/index.php/njphysiologicalsciences/article/view/463.