SANDGREN, Lennart. A correction to "On convex cones". MATHEMATICA SCANDINAVICA, [S. l.], v. 3, p. 170–170, 1955. DOI: 10.7146/math.scand.a-10437. Disponível em: https://tidsskrift.dk/math/article/view/10437. Acesso em: 14 aug. 2026.