Panthakant Janepinich, Chutimon Satirapipathkul, Naparat Kasetsomboon, Piyaphong Yongphet. Enhancing lutein extraction from marigolds through ultrasound-assisted optimization using response surface methodology. Maejo Int. J. Energ. Environ. Comm. or MIJEEC [internet]. 2023 Feb. 20 [cited 2026 Oct. 14];5(1):14-9. available from: https://ph02.tci-thaijo.org/index.php/MIJEEC/article/view/248359