DOPPEL, K.; JACOB, N. A non-hypoelliptic Dirichlet problem from stochastics. Annales Fennici Mathematici, [S. l.], v. 8, n. 2, p. 375–389, 1983. DOI: 10.5186/aasfm.1983.0809. Disponível em: https://afm.journal.fi/article/view/134480. Acesso em: 25 nov. 2024.