@article{DE_1986_22_1_a13,
     author = {Ya. Sh. Salimov},
     title = {Estimation of spectral density corresponding to an expansion in an $N$-multiple system of exponentials},
     journal = {Differencialʹnye uravneni\^a},
     pages = {114--125},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_1_a13/}
}