SHRESTHA, N. Perturbation Theory and Dalgarno-Lewis (DL) Method in Presence of Multiple Laser Beams. Nepal Journal of Science and Technology, [S. l.], v. 14, n. 2, p. 165–170, 2014. DOI: 10.3126/njst.v14i2.10432. Disponível em: https://nepjol.info/index.php/NJST/article/view/10432. Acesso em: 18 may. 2024.