Thu, Ta Huong, Le Anh Tuan, and Nghiem Trung Dung. “PRELIMINARY ESTIMATION OF EMISSION FACTORS FOR MOTORCYCLES IN REAL-WORLD TRAFFIC CONDITIONS OF HANOI”. <i>Vietnam Journal of Science and Technology</i> 48, no. 3 (June 25, 2012). Accessed January 10, 2026. https://vjs.ac.vn/jst/article/view/1147.