SKRZYPKOWSKA, E.; WOWK, Czesław. Linkage and the basic part of Witt rings. Annales Mathematicae Silesianae, [S. l.], v. 6, p. 9–12, 1992. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14261. Acesso em: 7 may. 2025.