@article{AA_2015_27_4_a1,
     author = {Yu. Belov},
     title = {Bessel sequences with finite upper density in the de {Branges} spaces},
     journal = {Algebra i analiz},
     pages = {15--27},
     publisher = {mathdoc},
     volume = {27},
     number = {4},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2015_27_4_a1/}
}