@article{SM_1994_77_1_a13,
     author = {G. E. Tkebuchava},
     title = {On unconditional convergence with respect to systems of products of bases},
     journal = {Sbornik. Mathematics},
     pages = {231--244},
     publisher = {mathdoc},
     volume = {77},
     number = {1},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1994_77_1_a13/}
}