Subuki, I., H. Saidin, S. and Nabilah M. Hisan, N. (2018) “Optimisation of SC-CO2 Extraction of Curcuma zedoaria by Response Surface Methodology”, International Journal of Engineering & Technology, 7(3.11), pp. 84–88. doi:10.14419/ijet.v7i3.11.15935.