%0 Journal Article %A E. A. Anfert'eva %A N. G. Chudakov %T Effective estimates from below of the norms of ideals of an imaginary quadratic field %J Sbornik. Mathematics %D 1970 %P 47-58 %V 11 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1970_11_1_a2/ %G en %F SM_1970_11_1_a2