%0 Journal Article %A A. M. Sedletskii %T A~necessary condition for the uniform minimality of a~system of exponentials in~$L^p$ spaces on the line %J Sbornik. Mathematics %D 2001 %P 1721-1740 %V 192 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2001_192_11_a6/ %G en %F SM_2001_192_11_a6