F. Mbiapo and E. Fokou, “Nutritional Evaluation of Proteins ‘In Situ’ in the Leaves of <i>Corchorus olitorius, Amaranthus hybridus</i> and <i>Solanum macrocarpum</i> by Rat Feeding Experiments”, IJND, vol. 31, no. 3, pp. 68–74, Mar. 1994.