%0 Journal Article
%A Sh. Sh. Kary-Niyazov
%T Classes of co-absoluteness of Borel and hyper-Borel sets
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1990
%P 21-26
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1990_4_a5/
%G ru
%F VMUMM_1990_4_a5