@article{VNGU_2014_14_4_a4,
     author = {A. Yu. Duplishcheva},
     title = {About {Conditions} of {Invertibility} of {Difference} {Operators} of the {Second} {Order}},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {44--49},
     year = {2014},
     volume = {14},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2014_14_4_a4/}
}