SZOCIŃSKI, Brunon. On spaces with vector structure. Annales Mathematicae Silesianae, [S. l.], v. 6, p. 94–102, 1992. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14270. Acesso em: 7 may. 2025.