@article{INTA_1970_a4,
     author = {N. I. Kabanov},
     title = {Differential-geometric methods in the calculus of variations},
     journal = {Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya },
     pages = {193--224},
     publisher = {mathdoc},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTA_1970_a4/}
}