PARDHASARADHI, T. V. Systematic design of a triplet photographic objective. Defence Science Journal, [S. l.], v. 13, n. 1, p. 66–81, 2014. DOI: 10.14429/dsj.13.7073. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7073. Acesso em: 16 jun. 2025.