@article{DE_1997_33_3_a15,
     author = {V. A. Yurko},
     title = {An inverse problem for systems of differential equations with nonlinear dependence on the spectral parameter},
     journal = {Differencialʹnye uravneni\^a},
     pages = {390--395},
     publisher = {mathdoc},
     volume = {33},
     number = {3},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_3_a15/}
}