RANGARAJAN, S. K. Some infinite series involving Legendre functions. Defence Science Journal, [S. l.], v. 14, n. 4, p. 311–314, 2014. DOI: 10.14429/dsj.14.7177. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7177. Acesso em: 6 jul. 2025.