Adejumo, Olufunmilayo Ebunoluwa, et al. “Physicochemical Characteristics and HPLC Determination of Alpha-Tocopherol in Eighteen Edible Vegetable Oils Marketed in Nigeria”. Dhaka University Journal of Pharmaceutical Sciences, vol. 20, no. 1, June 2021, pp. 49-57, doi:10.3329/dujps.v20i1.54032.