Cahyani, Christy Nur, Mohamad Yani, and Andes Ismayana. 2025. “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 13 (2):470-81. https://doi.org/10.23960/jat.v13i2.10385.