@article{DE_1990_26_12_a6,
     author = {V. A. Il'in and K. V. Mal'kov},
     title = {Integrability of a class of higher-order nonlinear evolution systems that admit a nonselfadjoint zero curvature representation. {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2085--2088},
     publisher = {mathdoc},
     volume = {26},
     number = {12},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_12_a6/}
}