Ba, V., B. N. Thien, T. T. X. Truong, N. Q. Dao, L. X. Thuyen, L. C. Hao, and T. T. H. Loan. “A Preliminary Study of Geological Variation of In-Situ Gamma Dose Rate in the Vicinity of Coal-Fired Power Plants”. Science and Technology Development Journal, Vol. 23, no. 4, Jan. 2021, pp. 815-22, doi:https://doi.org/10.32508/stdj.v23i4.2461.