@article{IVM_2011_9_a7,
     author = {A. K. Rybnikov},
     title = {Differential-geometric structures defining higher order contact transformations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {70--89},
     publisher = {mathdoc},
     number = {9},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2011_9_a7/}
}