SUDARSHAN, E. C. G. Additive and Multiplicative Quantum Numbers. The Journal of the Indian Mathematical Society, [S. l.], v. 24, n. 3-4, p. 557–561, 1960. DOI: 10.18311/jims/1960/16932. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/16932. Acesso em: 28 apr. 2024.