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