Yakin, Engkus Ainul, et al. “Effect of Manganese (Mn2+) Addition on Cocoa Pod Fermentation With Phanerochaete Chrysosporium”. Pakistan Journal of Nutrition, vol. 16, no. 7, June 2017, pp. 508–513, https://doi.org/10.3923/pjn.2017.508.513.