%0 Journal Article %A Soogil Seo %T Cohomology groups of the class groups over a $\Bbb Z_p$ extension %J Acta Arithmetica %D 2005 %P 337-348 %V 120 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa120-4-2/ %R 10.4064/aa120-4-2 %G en %F 10_4064_aa120_4_2