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