COWSIK, R. C. Symbolic Powers of a Prime Ideal. The Journal of the Indian Mathematical Society, [S. l.], v. 39, n. 1-4, p. 325–327, 1975. Disponível em: http://www.informaticsjournals.com/index.php/jims/article/view/16660. Acesso em: 30 apr. 2024.