DUMIR, V. C.; HANS-GILL, R. J. Mathematical Contributions of Professor Hansraj Gupta. The Journal of the Indian Mathematical Society, [S. l.], v. 57, n. 1-4, p. 11–16, 1991. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/21886. Acesso em: 27 apr. 2024.