Dr. Sabarta Sembiring, et al. “Effect of Fermented Kepok Banana Corm Inclusion in the Diet on the Nutrient Digestibility and Mineral Ca and P Retention of Growing Pigs”. Global Journal of Medical Research, vol. 20, no. K10, Aug. 2020, pp. 35-42, https://medicalresearchjournal.org/index.php/GJMR/article/view/2214.