AGGARWAL, S. K. In Homogeneous Approximation in the Field of formal Power Series. The Journal of the Indian Mathematical Society, [S. l.], v. 32, n. 1-2, p. 403–419, 1968. DOI: 10.18311/jims/1968/16784. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/16784. Acesso em: 1 may. 2024.