Jaya, D. K., S. Y. K. Hasibuan, and D. Bria. “Isolation and Characterization of Potassium-Solubilizing Bacteria from Two Different Rhizospheres and a Cow Manure in IPB University”. Jurnal Biologi Tropis, vol. 21, no. 2, Apr. 2021, pp. 336-42, doi:10.29303/jbt.v21i2.2559.