GU, Y.; ZHANG, L. Degree counting theorems for singular Liouville systems. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 21, n. special, 1-2, p. 1103-1135, 2020. DOI: 10.2422/2036-2145.201812_007. Disponível em: http://20.103.181.36/index.php/annaliscienze/article/view/932. Acesso em: 27 may. 2025.