CARRELL, James B.; SOMMESE, Andrew John. Filtrations of meromorphic $C^*$ actions on complex manifolds. Mathematica Scandinavica, Berkeley, CA, United States, v. 53, p. 25–31, 1983. DOI: 10.7146/math.scand.a-12012. Disponível em: https://journals.msp.org/mscand/article/view/1658. Acesso em: 25 jul. 2026.