@article{DAN_1993_333_5_a10,
     author = {A. P. Krishchenko and S. B. Tkachev},
     title = {Dual nonlinear systems},
     journal = {Doklady Akademii Nauk},
     pages = {598--599},
     publisher = {mathdoc},
     volume = {333},
     number = {5},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_333_5_a10/}
}