Wilailak, Nipathon, Nukrob Narkprasom, Yardfon Tanongkankit, Mookarin Nookong, Chawakorn Sri-ngernyuang, and Kanjana Narkprasom. β€œOptimization for Lutein Extract and Antioxidant Activity from Marigold Flowers (π™π™–π™œπ™šπ™©π™šπ™¨ π™šπ™§π™šπ™˜π™©π™– L.) Using Ultrasonic Assisted Extraction”. Burapha Science Journal 30, no. 2 May-August (July 7, 2025): 597–613. accessed August 30, 2026. https://li05.tci-thaijo.org/index.php/buuscij/article/view/714.