CHIPLUNKAR, A. V. Global Dimension of Algebra of Differential Operators. The Journal of the Indian Mathematical Society, [S. l.], v. 38, n. 1-4, p. 1–17, 1974. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/16677. Acesso em: 6 may. 2024.