@article{DAN_1995_340_6_a8,
     author = {G. G. Bulychev},
     title = {Characteristic form of the equations of the dynamics of},
     journal = {Doklady Akademii Nauk},
     pages = {754--757},
     publisher = {mathdoc},
     volume = {340},
     number = {6},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_340_6_a8/}
}