@article{MMO_1953_2_a5,
     author = {G. F. Laptev},
     title = {Differential geometry of imbedded manifolds. {Group} theoretical method of differential geometric investigations},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {275--382},
     publisher = {mathdoc},
     volume = {2},
     year = {1953},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1953_2_a5/}
}