Xuan Mai, Pham, Van Thi Bong, and Nguyen Huu Huong. 1999. “VEHICLES, AIR POLLUTION AND LPG APPLICATION POTENTIAL IN HOCHIMINH CITY”. VNUHCM Journal of Science and Technology Development 2 (11&12), 41-53. https://doi.org/https://doi.org/10.32508/stdj.v2i11&12.3695.