GUPTA, V. P. Multi-G.M. tube System for Radioisotope Assay in Biomedical Use. Defence Science Journal, [S. l.], v. 17, n. 4, p. 231–236, 2014. DOI: 10.14429/dsj.17.7411. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7411. Acesso em: 18 aug. 2025.