Subuki, Istikamah, Aiman Nabilah Abdul Malek, Saidatul Husni Saidin, and Mazura Md. Pisar. 2018. “Optimization of Supercritical Extraction Conditions of Senna Alata and Evaluation of Biological Activity”. International Journal of Engineering & Technology 7 (3.11): 94-100. https://doi.org/10.14419/ijet.v7i3.11.15937.