Lersprajak, O., Kanpipit, N., Nualkaew, N., Puthongking, P., & Thapphasaraphong, S. (2021). Effects of Dipterocarpus alatus Leaf and Bark Extracts on UVB-Protection, Collagen Stimulating Activity and Nitric Oxide Inhibition: doi.org/10.26538/tjnpr/v5i9.18. Tropical Journal of Natural Product Research (TJNPR), 5(9), 1638-1644. https://tjnpr.org/index.php/home/article/view/426