METSÄNKYLÄ, T. A congruence for the class number of a cyclic field. Annales Fennici Mathematici, [S. l.], n. 472, 1971. DOI: 10.5186/aasfm.1971.472. Disponível em: https://afm.journal.fi/article/view/134128. Acesso em: 26 nov. 2024.