Quỳnh, Lê Hương, Phạm Thị Thu Trang, and Nguyễn Đăng Vững. 2025. “58. Safe Sex Knowledge and the Prevalence of Sexual Intercourse Among 12th-Grade Students at Nguyen Trai High School in Thuong Tin District, Hanoi in 2023”. Journal of Medical Research 195 (10):544-52. https://doi.org/10.52852/tcncyh.v195i10.3958.