BRONDSTED, Arne. Convex Sets and Chebyshev Sets II. MATHEMATICA SCANDINAVICA, [S. l.], v. 18, p. 5–15, 1966. DOI: 10.7146/math.scand.a-10773. Disponível em: https://tidsskrift.dk/math/article/view/10773. Acesso em: 14 aug. 2026.