CELAKOSKA, E.; TRENCEVSKI, K. Coverings by n-cubes and the Gauss–Bonnet theorem. Annales Fennici Mathematici, [S. l.], v. 43, n. 2, p. 1063–1072, 2018. DOI: 10.5186/aasfm.2018.4365. Disponível em: https://afm.journal.fi/article/view/135773. Acesso em: 20 maj. 2024.