@article{DE_1989_25_10_a33,
     author = {M. A. Mustafin},
     title = {The {Riesz} basis of a system of sines},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1832--1833},
     publisher = {mathdoc},
     volume = {25},
     number = {10},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_10_a33/}
}