%0 Journal Article %A Yu. L. Ershov %T Two Theorems on Defect-Freeness for Cyclic Extensions %J Matematičeskie trudy %D 2007 %P 92-111 %V 10 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MT_2007_10_2_a3/ %G ru %F MT_2007_10_2_a3