%0 Journal Article %A V. B. Lidskii %T Summability of series in terms of the principal vectors of non-selfadjoint operators %J Trudy Moskovskogo matematičeskogo obŝestva %D 1962 %P 3-35 %V 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/MMO_1962_11_a0/ %G ru %F MMO_1962_11_a0