S. Suryanti, A. Umami, S. Gunawan, I. S. Santi, and R. H. Maulana, “Influence of PGPR, Bio-Phosphate Microorganism and Phosphate on Growth of Oil Palm Seedlings Under Drought Stress Conditions”, KLS, vol. 7, no. 3, pp. 427–434, Jun. 2022.