HAN, S.-E.; YAO, W. Euler characteristics of digital wedge sums and their applications. Topological Methods in Nonlinear Analysis, [S. l.], v. 49, n. 1, p. 183–203, 2016. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2016.073. Acesso em: 22 jul. 2024.