@article{DAN_1963_152_1_a2,
     author = {V. V. Vagner},
     title = {On {Ehresmann's} theory of jets},
     journal = {Doklady Akademii Nauk},
     pages = {17--19},
     publisher = {mathdoc},
     volume = {152},
     number = {1},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_152_1_a2/}
}