MAJUMDAR, S.; SULTANA, Q. S. The Homology and Cohomology Groups of H₃. GANIT: Journal of Bangladesh Mathematical Society, [S. l.], v. 29, p. 139–146, 2011. DOI: 10.3329/ganit.v29i0.8523. Disponível em: https://banglajol.info/index.php/GANIT/article/view/8523. Acesso em: 18 sep. 2024.