@article{TMF_2016_189_2_a4,
     author = {O. V. Kaptsov},
     title = {Algebraic and geometric structures of analytic partial differential equations},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {219--238},
     publisher = {mathdoc},
     volume = {189},
     number = {2},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2016_189_2_a4/}
}