Ngoc Quang, Ung, To Anh Dung, Nguyen Minh Hai, Nguyen Duc Phuong, and Phan Trong Nghia. 2008. “ON THE RELIABILITY OF LIFE INSURRANCE PROBLEM”. Science and Technology Development Journal 11 (6), 5-12. https://doi.org/https://doi.org/10.32508/stdj.v11i6.2644.