%0 Journal Article %A A. G. Baskakov %A K. I. Chernyshov %T Spectral analysis of linear relations and degenerate operator semigroups %J Sbornik. Mathematics %D 2002 %P 1573-1610 %V 193 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2002_193_11_a0/ %G en %F SM_2002_193_11_a0