BHATNAGAR, R. K. Some Particulars Solutions of the Equation E4. Defence Science Journal, [S. l.], v. 12, n. 1, p. 12–19, 2014. DOI: 10.14429/dsj.12.6828. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/6828. Acesso em: 15 jun. 2025.