CHANG, K. C.; LIU, J. A cohomology complex for manifolds with boundary. Topological Methods in Nonlinear Analysis, [S. l.], v. 5, n. 2, p. 325–340, 1995. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1995.022. Acesso em: 22 jul. 2024.