@article{DAN_1977_235_4_a0,
     author = {V. I. Baran and V. P. Kondakov},
     title = {Quasi-equivalence of absolute bases in spaces of classes $(d_1)$ and $(d_2)$},
     journal = {Doklady Akademii Nauk},
     pages = {729--732},
     publisher = {mathdoc},
     volume = {235},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_235_4_a0/}
}