JHA, P.; LAL, S. Spontaneous emission and harmonic generation in free electron laser with elliptically polarised electromagnetic wiggler. Defence Science Journal, [S. l.], v. 51, n. 4, p. 437–443, 2002. DOI: 10.14429/dsj.51.2260. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/2260. Acesso em: 1 jul. 2025.