D’AGNOLO, A.; SCHAPIRA, P. Correspondence for $\mathcal D$-modules and Penrose transform. Topological Methods in Nonlinear Analysis, [S. l.], v. 3, n. 1, p. 55–68, 1994. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1994.003. Acesso em: 26 apr. 2024.