Naing, Hsu Thet Hmue, et al. “Solid State Fermentation of Soybean Meal With Aspergillus Niger for Upgrading Nutritive Values”. International Journal for Innovation Education and Research, vol. 7, no. 5, May 2019, pp. 374-81, https://doi.org/10.31686/ijier.vol7.iss5.1531.