Bui Van Ga, Le Minh Tien , Bui Van Hung, Le Minh Triet. “Conversion of a Traditional Gasoline Stationary Engine into a PI Engine”. The University of Danang - Journal of Science and Technology 17, no. 11 (November 30, 2019): 1–5. Accessed May 19, 2024. https://jst-ud.vn/jst-ud/article/view/2810.