@article{DAN_1972_205_3_a6,
     author = {M. A. Rutman and L. T. Ignatenko},
     title = {On the order of exponential growth of solutions of some linear difference equations},
     journal = {Doklady Akademii Nauk},
     pages = {530--532},
     publisher = {mathdoc},
     volume = {205},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_205_3_a6/}
}