GHOSH, P. . Different type of Population Inversion in Laser. T.E.M.S Journal [Technology Engineering Maths Science], [S. l.], v. 3, n. 2, p. 62-63, 2021. Disponível em: https://journals.wingsofaero.in/index.php/tems/article/view/101. Acesso em: 20 may. 2022.