Tuan, Pham M., et al. “Pigments, Phenolics, Antioxidant Activity, Anti--Amylase, and In Vitro Anti-Inflammatory Properties of Crude Acetonic Extract from Viola Dalatensis: Http: www.doi.org 10.26538 Tjnpr V7i12.34”. Tropical Journal of Natural Product Research (TJNPR), vol. 7, no. 12, Dec. 2023, pp. 5606-10, https://www.tjnpr.org/index.php/home/article/view/3204.