G. CHIOSSI, S.; NAGY, P.-A. Systems of symplectic forms on four-manifolds. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 12, n. 3, p. 717-734, 2013. DOI: 10.2422/2036-2145.201102_006. Disponível em: http://20.103.181.36/index.php/annaliscienze/article/view/308. Acesso em: 28 may. 2025.