TAHORA, S.; AHMED, K. M. Study on De Rham Cohomology Algebra of Manifolds. Dhaka University Journal of Science, [S. l.], v. 64, n. 2, p. 109–113, 2016. DOI: 10.3329/dujs.v64i2.54484. Disponível em: https://banglajol.info/index.php/DUJS/article/view/54484. Acesso em: 16 aug. 2024.