%0 Journal Article %A CAPRIGLIO, FILIPPO A. E. NUCCIO MORTARINO MAJNO DI %T CLASS NUMBER FORMULA FOR DIHEDRAL EXTENSIONS %J Glasgow mathematical journal %D 2020 %P 323-353 %V 62 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089519000144/ %R 10.1017/S0017089519000144 %F 10_1017_S0017089519000144