NICOLA, F. On the absence of the one-sided Poincaré lemma in Cauchy-Riemann manifolds. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 4, n. 4, p. 587-600, 2009. DOI: 10.2422/2036-2145.2005.4.02. Disponível em: http://20.103.181.36/index.php/annaliscienze/article/view/80. Acesso em: 17 jun. 2025.