%0 Journal Article %A I. S. Kats %T Linear relations generated by the canonical differential equation of dimension~2, and eigenfunction expansions %J Algebra i analiz %D 2002 %P 86-120 %V 14 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_2002_14_3_a3/ %G ru %F AA_2002_14_3_a3