Markom, M., N. Hassim, N. Anuar, and S. N. Baharum. “Co-Solvent Selection for Supercritical Fluid Extraction of Essential Oil and Bioactive Compounds from Polygonum Minus”. ASEAN Journal of Chemical Engineering, Vol. 12, no. 2, Dec. 2012, pp. 19-26, https://jurnal.ugm.ac.id/v3/AJChE/article/view/8128.