Dinh Ang, D., V. Thanh Nhieu, and D. Ngoc Thanh. “IDENTIFICATION OF MASS ONHOMOGENEITY FROM GRAVITY ANOMALIES & LINEARIZATION AND REGULARIZATIO: BY MOMENT PROBLEMS”. Science and Technology Development Journal, Vol. 6, no. 3&4, Apr. 2003, pp. 5-7, doi:https://doi.org/10.32508/stdj.v6i3&4.3311.