T. Habib, S. Begum, T. Ali, M. Imtiaz, and S. Masood, “Antinociceptive and Anti-inflammatory Effects of Combined Administration of a-Tocopherol and Morphine in Acetic Acid Induced Writhing Test”, Anwer Khan Mod Med Coll J, vol. 7, no. 2, pp. 20–24, Feb. 2017.