%0 Journal Article %A Makoto Ishida %T Existence of an unramified cyclic extension and congruence conditions %J Acta Arithmetica %D 1988 %P 75-84 %V 51 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-51-1-75-84/ %R 10.4064/aa-51-1-75-84 %G en %F 10_4064_aa_51_1_75_84