%0 Journal Article
%A Marta Frankowska
%A Andrzej Nowik
%T The ideal $(a)$ is not $G_\delta$ generated
%J Colloquium Mathematicum
%D 2011
%P 7-14
%V 125
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm125-1-2/
%R 10.4064/cm125-1-2
%G en
%F 10_4064_cm125_1_2