Idham, Z., Nasir, H., Yunus, M., Lee, N., Wong, L., Hassan, H., & Setapar, S. (2017). Optimisation of Supercritical CO₂ Extraction of Red Colour from Roselle (Hibiscus Sabdariffa Linn.) Calyces. Chemical Engineering Transactions, 56, 871-876. https://doi.org/10.3303/CET1756146