Optimization of Supercritical Carbon Dioxide and Co-solvent Ethanol Extraction of Wasted Peanut Skin Using Response Surface MethodologyNicky Rahmana Putra, Ahmad Hazim Abdul Aziz, Lee Nian Yian, Wan Diyana Ramli and Mohd Azizi Che YunusMATEC Web Conf., 156 (2018) 02005DOI: https://doi.org/10.1051/matecconf/201815602005