VARADARAJAN, K. Generalised Gottlieb Groups. The Journal of the Indian Mathematical Society, [S. l.], v. 33, n. 2-4, p. 141–164, 1969. DOI: 10.18311/jims/1969/16754. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/16754. Acesso em: 4 may. 2024.