%0 Journal Article %A Heima Hayashi %T Note on an index formula of elliptic units in a ring class field %J Acta Arithmetica %D 1985 %P 201-210 %V 45 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-45-3-201-210/ %R 10.4064/aa-45-3-201-210 %G en %F 10_4064_aa_45_3_201_210