@article{DAN_1977_233_1_a7,
     author = {A. M. Obukhov},
     title = {On symmetrizable nonlinear systems},
     journal = {Doklady Akademii Nauk},
     pages = {35--38},
     year = {1977},
     volume = {233},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_233_1_a7/}
}