%0 Journal Article %A R. Narasimhan %A K. Chandrasekharan %T Zeta-Functions of Ideal Classes in Quadratic Fields and their Zeros on the Critical Line. %J Commentarii mathematici Helvetici %D 1968 %P 18-30 %V 43 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1968__43_139349/ %F CMH_1968__43_139349