@article{FPM_2010_16_1_a4,
     author = {L. E. Evtushik and O. M. Omelyan},
     title = {A~category-theoretic approach extending the notion of connection in a~natural way, and its application to the geometry of differential systems},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {55--63},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2010_16_1_a4/}
}