%0 Journal Article %A Heima Hayashi %T Note on an index formula of elliptic units in a ring class field II %J Acta Arithmetica %D 1988 %P 351-353 %V 50 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-50-4-351-353/ %R 10.4064/aa-50-4-351-353 %G en %F 10_4064_aa_50_4_351_353