KHIEM, L. H.; TRONG, T. D.; THAO, N. V. A Feasibility Study in Application of a Gamma Scattering Technique for Inspecting Density Variation. Communications in Physics, [S. l.], v. 22, n. 3, p. 275, 2012. DOI: 10.15625/0868-3166/22/3/161. Disponível em: https://vjs.ac.vn/index.php/cip/article/view/161. Acesso em: 21 oct. 2021.