Nivedita (2024) “Study of Threshold Condition and Population Inversion in Helium-Neon laser”, Eduzone: International Peer Reviewed/Refereed Multidisciplinary Journal, 13(2), pp. 203–213. Available at: https://www.eduzonejournal.com/index.php/eiprmj/article/view/911 (Accessed: 3 March 2026).