Nguyen, Thu-Nhung, Hoang-Hai Pham, Van-Manh Pham, and Manh-Ha Nguyen. “Tourism Climate Index on the Co To Islands of Quang Ninh Province, Vietnam”. Vietnam Journal of Marine Science and Technology 20, no. 3 (September 30, 2020): 255–266. Accessed November 25, 2024. https://vjs.ac.vn/index.php/jmst/article/view/15250.