HOSSAIN, M. A. Structures Of Surfaces With Non-Zero Constant Curvature. GANIT: Journal of Bangladesh Mathematical Society, [S. l.], v. 32, p. 37–41, 2013. DOI: 10.3329/ganit.v32i0.13644. Disponível em: https://banglajol.info/index.php/GANIT/article/view/13644. Acesso em: 22 dec. 2024.