%0 Journal Article %A M. Yu. Ignatiev %T Reconstruction formula for differential systems with a singularity %J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics %D 2021 %P 282-293 %V 21 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ISU_2021_21_3_a0/ %G en %F ISU_2021_21_3_a0