Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1969_5_3_a9, author = {K. G. Val\={e}\={e}v}, title = {Linear difference equations with exponential coefficients}, journal = {Differencialʹnye uravneni\^a}, pages = {499--506}, publisher = {mathdoc}, volume = {5}, number = {3}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_3_a9/} }
K. G. Valēēv. Linear difference equations with exponential coefficients. Differencialʹnye uravneniâ, Tome 5 (1969) no. 3, pp. 499-506. http://geodesic.mathdoc.fr/item/DE_1969_5_3_a9/