Pawignya, H., T. D. Kusworo, and B. Pramudono. “Optimization for Production Tert-Butyl Oleyl Glycoside Nonioic Surfactant Using Response Surface Methodology”. ASEAN Journal of Chemical Engineering, Vol. 18, no. 2, Dec. 2018, pp. 62-69, https://jurnal.ugm.ac.id/v3/AJChE/article/view/9025.