%0 Journal Article %A A. M. Akhmedov %T On the unconditional convergence of multiple expansions in a %J Doklady Akademii Nauk %D 1987 %P 521-524 %V 293 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_293_3_a0/ %G ru %F DAN_1987_293_3_a0