KULPA, Władysław; PLEWIK, Szymon; TURZAŃSKI, Marian. Bolzano-Weierstrass principle of choice extended towards ordinals. Annales Mathematicae Silesianae, [S. l.], v. 17, p. 9–16, 2003. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14097. Acesso em: 7 may. 2025.