@article{TRSPY_1964_70_a5,
     author = {A. V. Ivanov},
     title = {Computational properties of regular difference equations},
     journal = {Informatics and Automation},
     pages = {59--115},
     publisher = {mathdoc},
     volume = {70},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1964_70_a5/}
}