“PROCESS IMPROVEMENT OF METHYL ESTER SULFONATE SURFACTANT PRODUCTION AND ITS FORMULATION FOR THE ENHANCED OIL RECOVERY (EOR) APPLICATION”, JTIP, vol. 21, no. 1, Nov. 2011, Accessed: Dec. 23, 2025. [Online]. Available: https://journal.ipb.ac.id/jurnaltin/article/view/3667