N. R. OSSAI, A. E. OJIEH, J. I. WILSON, B. C. NWOGUEZE, U. S. NWABUOKU, and E. K. NWANGWA, “VERNONIA AMYGDALINA ETHANOL LEAF EXTRACT PROTECTS AGAINST TRAMADOL-INDUCED ORGAN DAMAGES THROUGH INHIBITION OF OXIDATIVE STRESS”, ICSIS, vol. 1, no. 1, pp. 424–445, Apr. 2023.