«Effects of Castration on Epidural Administration of Lidocaine-Tramadol in West African Dwarf (Wad) Goats». (2019) Nigerian Journal of Physiological Sciences, 34(2), pp. 141–147. Disponibile su: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/463 (Consultato: 19 settembre 2026).