BHATTACHARYYA, P. K. Geometrical Ray Tracing of Ion-Trajectories for an Astigmatic Sector Focused Beta Ray Spectrograph. Defence Science Journal, [S. l.], v. 21, n. 4, p. 283–290, 2014. DOI: 10.14429/dsj.21.6293. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/6293. Acesso em: 16 jun. 2025.