@article{DE_1978_14_2_a13,
     author = {A. A. Aizikovich},
     title = {The {P\'olya--Mammana} factorization of a linear matrix difference {operator.~I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {328--337},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_2_a13/}
}