Nguyễn, Hà Tuyết Minh, DongQuy Hoang, and Thị Chi Phạm. “Study of Flame Retardancy, Thermal and Physical Properties of Rigid Polyurethane Foam Based on Recycled Poly(ethylene Terephthalate) Using Non-Halogen Flame Retardant”. VNUHCM Journal of Natural Sciences 5, no. 2 (April 30, 2021): 1189-1197. Accessed October 4, 2025. http://stdjns.scienceandtechnology.com.vn/index.php/stdjns/article/view/1011.