SZYMICZEK, Kazimierz. 2-ranks of class groups of Witt equivalent number fields. Annales Mathematicae Silesianae, [S. l.], v. 12, p. 53–64, 1998. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14163. Acesso em: 4 jul. 2025.