@article{MM_1995_7_5_a59,
     author = {I. M. Nefedov and I. A. Shereshevskii},
     title = {On the calculation of exponents for difference operators},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {88},
     publisher = {mathdoc},
     volume = {7},
     number = {5},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1995_7_5_a59/}
}