@article{SM_1994_77_1_a6,
     author = {G. M. Gubreev},
     title = {On a class of unconditional bases in {Hilbert} spaces and on the~problem of similarity of dissipative {Volterra} operators},
     journal = {Sbornik. Mathematics},
     pages = {93--126},
     publisher = {mathdoc},
     volume = {77},
     number = {1},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1994_77_1_a6/}
}