Uwakwe, A. A., and M. O. Monanu. “In Vitro Effects of Aspirin and Paracetamol on Human Erythrocyte Glutathione-S-Transferase Activity”. Global Journal of Medical Sciences, vol. 3, no. 1, Nov. 2004, pp. 33-36, doi:10.4314/gjms.v3i1.10139.