%0 Journal Article %A V. A. Yurko %T On higher-order differential operators with a~regular singularity %J Sbornik. Mathematics %D 1995 %P 901-928 %V 186 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1995_186_6_a6/ %G en %F SM_1995_186_6_a6