CRISTEA, Mihai. A note on the local injectivity of weakly differentiable mappings having constant Jacobian sign. Mathematica Scandinavica, Berkeley, CA, United States, v. 93, n. 1, p. 91–98, 2003. DOI: 10.7146/math.scand.a-14414. Disponível em: https://journals.msp.org/mscand/article/view/805. Acesso em: 24 jul. 2026.