%0 Journal Article %A N. B. Konyukhova %T Admissible boundary conditions at an irregular singular point for systems of linear ordinary differential equations %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1983 %P 806-824 %V 23 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZVMMF_1983_23_4_a3/ %G ru %F ZVMMF_1983_23_4_a3