%0 Journal Article %A L. E. Evtushik %A O. M. Omelyan %T A~category-theoretic approach extending the notion of connection in a~natural way, and its application to the geometry of differential systems %J Fundamentalʹnaâ i prikladnaâ matematika %D 2010 %P 55-63 %V 16 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FPM_2010_16_1_a4/ %G ru %F FPM_2010_16_1_a4