@article{DAN_1968_178_2_a11,
     author = {D. B. Fuchs},
     title = {The {Maslov--Arnolʹd} characteristic classes},
     journal = {Doklady Akademii Nauk},
     pages = {303--306},
     publisher = {mathdoc},
     volume = {178},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_178_2_a11/}
}