@article{IM2_2022_86_1_a4,
     author = {K. P. Isaev and R. S. Yulmukhametov},
     title = {Unconditional bases in radial {Hilbert} spaces},
     journal = {Izvestiya. Mathematics },
     pages = {150--168},
     publisher = {mathdoc},
     volume = {86},
     number = {1},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2022_86_1_a4/}
}