%0 Journal Article %A T. A. Samarskaya %T Equiconvergence of spectral expansions that correspond to nonselfadjoint extensions of a second-order differential operator %J Differencialʹnye uravneniâ %D 1988 %P 155-166 %V 24 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1988_24_1_a17/ %G ru %F DE_1988_24_1_a17