N. A. . Mohd Zainuddin, F. . Tuah, and M. A. . Mohd Ariff, “Effect of Pressure on Essential Oil Yield of Chromolaena Odorata Leaves Extract using Supercritical Fluid Carbon Dioxide”, J. Adv. Res. App. Sc. Eng. Tech., vol. 17, no. 1, pp. 29–35, Dec. 2020.