@article{VUU_2015_25_2_a7,
     author = {A. Sh. Shukurov},
     title = {About one type of sequences that are not a {Schauder} basis in {Hilbert} spaces},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {244--247},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VUU_2015_25_2_a7/}
}