YUCAS, Joseph L. A classification theorem for quadratic forms over semi-local rings. Annales Mathematicae Silesianae, [S. l.], v. 2, p. 7–12, 1986. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/14313. Acesso em: 7 dec. 2025.