Quancheng, Z. (2010) “Optimization of xanthophylls extraction from Marigold extractum with supercritical CO2 by response surface methodology”, International Journal of Agricultural and Biological Engineering. Beijing, China, 3(2), pp. 58–63. Available at: https://ijabe.org/index.php/ijabe/article/view/137 (Accessed: 31 March 2026).