Y. Witono, C. Anam, H. Herlina, and A. Dwi Pamujiati, “Chemical and Functional Properties of Protein Isolate from Cowpea (Vigna unguiculata)”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 4, no. 2, pp. 94–98, Apr. 2014.