%0 Journal Article %A I. S. Lomov %T The Local Convergence of Biorthogonal Series Related to Differential Operators with Nonsmooth Coefficients: I %J Differencialʹnye uravneniâ %D 2001 %P 328-342 %V 37 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2001_37_3_a4/ %G ru %F DE_2001_37_3_a4