«Effects of Castration on Epidural Administration of Lidocaine-Tramadol in West African Dwarf (Wad) Goats». (2019) Nigerian Journal of Physiological Sciences, 34(2), сс. 141–147. доступно на: https://www.ojshostng.com/index.php/njphysiologicalsciences/article/view/463 (просмотрено: 6 апрель 2026).