@article{01484656, title = {On the rearranged block-orthonormal systems.}, journal = {Georgian Mathematical Journal}, volume = {7}, year = {2000}, pages = {169-177}, zbl = {0962.42019}, language = {en}, url = {http://dml.mathdoc.fr/item/01484656} }
Nadibaidze, G. On the rearranged block-orthonormal systems.. Georgian Mathematical Journal, Tome 7 (2000) pp. 169-177. http://gdmltest.u-ga.fr/item/01484656/