VAN HIEU, Nguyen et al.
 Estimation of Tourists’ Willingness to Pay  in Ba Vi National Park: Choice Experiment Method.
<strong>VNU Journal of Science: Policy and Management Studies</strong>, [S.l.], v. 35, n. 4, dec. 2019.
ISSN 2588-1116.
Available at: &lt;<a href="https://js.vnu.edu.vn/PaM/article/view/4199" target="_new">https://js.vnu.edu.vn/PaM/article/view/4199</a>&gt;. Date accessed: 19 may 2024.
doi: <a href="https://doi.org/10.25073/2588-1116/vnupam.4199">https://doi.org/10.25073/2588-1116/vnupam.4199</a>.