%0 Journal Article %A Manabu Ozaki %T Kummer's lemma for $ℤ_p$-extensions over totally real number fields %J Acta Arithmetica %D 1997 %P 37-44 %V 81 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-81-1-37-44/ %R 10.4064/aa-81-1-37-44 %G en %F 10_4064_aa_81_1_37_44