Bhattacharyya, P. “Geometrical Ray Tracing of Ion-Trajectories for an Astigmatic Sector Focused Beta Ray Spectrograph”. Defence Science Journal 21, no. 4 (October 1, 2014): 283-290. Accessed April 19, 2024. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/6293.