Nam, Hoàng Minh, Trần Thế Hoàng, Hoà Thị Hồng Hạnh, Cao Bá Khương, and Nguyễn Thị Phương Lan. 2023. “30. Willingness to Pay for the Covid-19 Vaccine Available in Vietnam and Some Factors Related”. Journal of Medical Research 163 (2):265-74. https://doi.org/10.52852/tcncyh.v163i2.1211.