DJIRE, Ibrahim K.; WIEGERINCK, Jan. On a question of Sadullaev concerning boundary relative extremal functions. MATHEMATICA SCANDINAVICA, [S. l.], v. 124, n. 1, p. 51–60, 2019. DOI: 10.7146/math.scand.a-105141. Disponível em: https://www.mscand.dk/article/view/105141. Acesso em: 5 dec. 2025.