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://journals.us.edu.pl/index.php/AMSIL/article/view/14261. Acesso em: 5 dec. 2025.