C. N. Cahyani, 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”, JAT, vol. 13, no. 2, pp. 470–481, May 2025.