Ketmaro P, Muangsiri W, Werawatganone P. UV Spectroscopic Characterization and Stabilities of Natural Colorants from Roselle Calyx, Lac Resin and Gardenia Fruit. J Health Res [internet]. 2018 Nov. 21 [cited 2026 Sep. 30];24(1):7-13. available from: https://he01.tci-thaijo.org/index.php/jhealthres/article/view/156630