K. Khairiah, S. Kiptiyah, I. Khoirunnisa, and S. Nurunazmi, “Physicochemical Properties Of Sorghum (Sorghum Bicolor L.) Tempeh At Different Fermentation Times And Yeast Concentrations”, AGRITEPA, vol. 12, no. 1, pp. 225-242, Jun. 2025.