Determination of radionuclide impurities in pure beta radiation sources by semiconductor spectrometry. Acta Polytechnica CTU Proceedings, [S. l.], v. 37, p. 43–47, 2022. DOI: 10.14311/APP.2022.37.0043. Disponível em: https://ojs.cvut.cz/ojs/index.php/APP/article/view/8562. Acesso em: 15 mar. 2025.