MERKER, J.; NUROWSKI, P. . Five-dimensional para-CR manifolds and contact projective geometry in dimension three. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 24, n. 1, p. 519-549, 2021. DOI: 10.2422/2036-2145.202105_067. Disponível em: http://20.103.181.36/index.php/annaliscienze/article/view/5745. Acesso em: 14 jun. 2025.