%0 Journal Article
%A Petr Holický
%A Jiří Spurný
%T $F_{\sigma}$-mappings and the invariance of absolute Borel classes
%J Fundamenta Mathematicae
%D 2004
%P 193-204
%V 182
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm182-3-1/
%R 10.4064/fm182-3-1
%G en
%F 10_4064_fm182_3_1