DATTA, K. P.; SINHA, R. P. A method for testing rangefinder collimator in respect of parallelism of beams in the directions of coincidence and halving. Defence Science Journal, [S. l.], v. 12, n. 3, p. 251–252, 2014. DOI: 10.14429/dsj.12.7189. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7189. Acesso em: 16 jun. 2025.