Boonnop, K., M. Wanapat, N. Nontaso, and S. Wanapat. “ Enriching Nutritive Value of Cassava Root by Yeast Fermentation ”. Scientia Agricola, Vol. 66, no. 5, Oct. 2009, pp. 629-33, doi:10.1590/S0103-90162009000500007.