@article{DAN_1981_260_3_a7,
     author = {V. M. Kuntsevich and M. M. Lychak},
     title = {Difference equations of set evolution and stability of their solutions},
     journal = {Doklady Akademii Nauk},
     pages = {547--549},
     publisher = {mathdoc},
     volume = {260},
     number = {3},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_260_3_a7/}
}