Van Ngo, D., N. Viet Ky, and N. Dinh Tu. “NECESSITY AND ABILITY TO DEVELOP SUBSURFACE STRUCTURES IN URBAN AREAS OF HOCHIMINH CITY”. VNUHCM Journal of Science and Technology Development, Vol. 6, no. 5&6, June 2003, pp. 38-45, doi:https://doi.org/10.32508/stdj.v6i5&6.3328.