ERDOGAN, M.; YILMAZ, G. A characterization of convex hypersurfaces in Hadamard manifolds. MATHEMATICA SCANDINAVICA, [S. l.], v. 97, n. 1, p. 40–48, 2005. DOI: 10.7146/math.scand.a-14962. Disponível em: https://www.mscand.dk/article/view/14962. Acesso em: 29 mar. 2024.