@article{MZM_1994_56_4_a7,
     author = {L. V. Zilbergleit and V. V. Lychagin},
     title = {Spencer cohomologies and symmetries},
     journal = {Matemati\v{c}eskie zametki},
     pages = {79--94},
     publisher = {mathdoc},
     volume = {56},
     number = {4},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1994_56_4_a7/}
}