@article{GMJ_1999__6_1_48218,
     author = {Nadibaidze, G.},
     title = {On the absolute summability of series with respect to block-orthonormal systems.},
     journal = {Georgian Mathematical Journal},
     pages = {83--90},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1999},
     zbl = {0920.42023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_1999__6_1_48218/}
}