Mariod, A. A., B. Matthäus, K. Eichner, and I. H. Hussein. “Antioxidant Activity of Extracts from Sclerocarya Birrea Kernel Oil Cake”. Grasas Y Aceites, vol. 57, no. 4, Dec. 2006, pp. 361-6, doi:10.3989/gya.2006.v57.i4.60.