PRASANNA, A. R. Prof. V.V. Narlikar. The Journal of the Indian Mathematical Society, [S. l.], v. 61, n. 1-2, p. 1–6, 1995. Disponível em: https://informaticsjournals.co.in/index.php/jims/article/view/21859. Acesso em: 7 nov. 2024.