Susetyo, R.D. , Wahyu Wilopo, Suwarno Hadisusanto and Endah Retnaningrum 2025. Exploration of Indigeneous Biosurfactant-producing Bacillus sp. from Petroleum Hydrocarbon-contaminated Soil in Indonesia . Applied Environmental Research. 47, 4 (Oct. 2025), 1–13. DOI:https://doi.org/10.35762/AER.2025036.