Cuong, D. H.; Anh, B. T. B.; Nhan, N. T.; Tung, N. X.; Hung, P. D.; Thanh, N. X. VIETNAM - RUSSIAN COOPERATION INSTALLING AND TESTING THE TOMOGRAPHY ELECTRIC COMPLEX (TEC-2) FOR INVESTIGATION OF SHALLOW GEOLOGICAL ENVIRONMENT. VJMST 2015, 15, 399-405.