%0 Journal Article %A S. V. Astashkin %A E. M. Semenov %T On a Property of Rearrangement Invariant Spaces whose Second K\"othe Dual is Nonseparable %J Matematičeskie zametki %D 2020 %P 11-22 %V 107 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2020_107_1_a1/ %G ru %F MZM_2020_107_1_a1