KUTTNER, B. Note on a Paper by M. S. Ramanujan on Quasi-Hausdorff Transformations. The Journal of the Indian Mathematical Society, [S. l.], v. 21, n. 3-4, p. 97–104, 1957. DOI: 10.18311/jims/1957/16962. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/16962. Acesso em: 8 may. 2024.