Nguyen Duy Anh, Nguyen Huu Van, and Tran Van Hien. “Study on Synthesis of Biodegradable Polyurea Grease Using Modified Vegetable Oil”. Journal of Military Science and Technology, no. FEE (December 30, 2022): 279–284. Accessed December 22, 2024. https://online.jmst.info/index.php/jmst/article/view/759.