%0 Journal Article %A T. M. Vukolova %A B. V. Simonov %T Properties of sums of double trigonometric series with multiply monotone coefficients %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2020 %P 8-22 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2020_5_a1/ %G ru %F VMUMM_2020_5_a1