Nguyen, N. D., T. T. V. Vo, and K. U. Nguyen. “Critical Concentration of the Exotic Nuclei in the 232Th Chain for the Alpha Analysts”. Science and Technology Development Journal, Vol. 22, no. 2, June 2019, pp. 213-8, doi:https://doi.org/10.32508/stdj.v22i2.1543.