@article{DAN_1977_235_2_a3,
     author = {M. G. Gasymov and A. M. Magerramov},
     title = {On the existence of transformation operators for high-order differential equations polynomially depending on a parameter},
     journal = {Doklady Akademii Nauk},
     pages = {259--262},
     publisher = {mathdoc},
     volume = {235},
     number = {2},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_235_2_a3/}
}