Mariod, A., and B. Matthäus. “Physico-Chemical Properties, Fatty Acid and Tocopherol Composition of Oils from Some Sudanese Oil Bearing Sources”. Grasas Y Aceites, vol. 59, no. 4, Dec. 2008, pp. 321-6, doi:10.3989/gya.2008.v59.i4.525.