BALAKRISHNAN, D. .; UMADEVI , A. G.; ABRAHAM, J.; RAJAGOPALAN, M.; JOJO, J. A Study on Activity Concentration of Natural Radionuclide of Building Materials in Kochi: Natural Radionuclide. International Journal of Fundamental Physical Sciences, [S. l.], v. 2, n. 3, p. 41-43, 2012. DOI: 10.14331/ijfps.2012.330034. Disponível em: https://fundamentaljournals.org/index.php/ijfps/article/view/113. Acesso em: 2 dec. 2023.