Munandar, R. et al. 2023. The Optimization of Encapsulation Mangosteen (Garcinia mangostana L.)-Gotu Kola (Centella asiatica L. Urban) Fraction Combination in Soybean Liposome by Response Surface Methodology: http://www.doi.org/10.26538/tjnpr/v7i9.15. Tropical Journal of Natural Product Research (TJNPR). 7, 9 (Oct. 2023), 3944–3950.