Cahyani, C. N., M. Yani, and A. Ismayana. “APPLICATION OF RESPONSE SURFACE METHODOLOGY FOR OPTIMIZATION THE BIODEGRADATION PROCESS OF PETROLEUM-CONTAMINATED BEACH SAND USING BIO-OIL SPILL DISPERSANT (OSD) AND Bacillus Subtilis CYA27”. Jurnal Agrotek Tropika, vol. 13, no. 2, May 2025, pp. 470-81, doi:10.23960/jat.v13i2.10385.