%0 Journal Article
%A González-Hernández, Juan
%A Hernández-Hernández, Fernando
%A Villarreal, César E.
%T When is $\Bbb R$ the union of an increasing family of null sets?
%J Commentationes Mathematicae Universitatis Carolinae
%D 2007
%P 623-630
%V 48
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_2007__48_4_a5/
%G en
%F CMUC_2007__48_4_a5