%0 Journal Article %A V. A. Kolyvagin %T On the first case of Fermat's theorem for cyclotomic fields %J Izvestiya. Mathematics %D 1999 %P 983-994 %V 63 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1999_63_5_a4/ %G en %F IM2_1999_63_5_a4