@article{RM_1990_45_6_a6,
     author = {A. V. Balandin},
     title = {On a~system of differential equations admitting a~representation of zero curvature},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {141--142},
     publisher = {mathdoc},
     volume = {45},
     number = {6},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1990_45_6_a6/}
}