%0 Journal Article %A A. Tselishchev %T Absence of local unconditional structure in spaces of smooth functions on the two-dimensional torus %J Zapiski Nauchnykh Seminarov POMI %D 2020 %P 153-172 %V 491 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2020_491_a8/ %G ru %F ZNSL_2020_491_a8