JIANG, Mei-Yue. Morse homology and degenerate Morse inequalities. Topological Methods in Nonlinear Analysis, [S. l.], v. 13, n. 1, p. 147–161, 1999. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1999.007. Acesso em: 1 jul. 2025.