Nguyễn, Hà Tuyết Minh, DongQuy Hoang, and Thị Chi Phạm. 2021. “Study of Flame Retardancy, Thermal and Physical Properties of Rigid Polyurethane Foam Based on Recycled Poly(ethylene Terephthalate) Using Non-Halogen Flame Retardant”. Science & Technology Development Journal: Natural Sciences 5 (2), 1189-97. https://doi.org/https://doi.org/10.32508/stdjns.v5i2.1011.