CRISTEA, M. A note on the local injectivity of weakly differentiable mappings having constant Jacobian sign. MATHEMATICA SCANDINAVICA, [S. l.], v. 93, n. 1, p. 91–98, 2003. DOI: 10.7146/math.scand.a-14414. Disponível em: https://www.mscand.dk/article/view/14414. Acesso em: 7 may. 2024.