HIEU, Nguyen; PHAI, Vu Van; HOWARD, Limbert.
Cave systems in Phong Nha - Ke Bang area.
VNU Journal of Science: Earth and Environmental Sciences, [S.l.], v. 28, n. 4, dec. 2012.
ISSN 2588-1094.
Available at: <https://js.vnu.edu.vn/EES/article/view/1555>. Date accessed: 22 nov. 2024.