%0 Journal Article
%A Porubský, Štefan
%A Schönheim, Jochanan
%T Old and new necessary and sufficient conditions on $(a_i, m_i)$ in order that $n\equiv a_i (\operatorname {mod} m_i)$ be a covering system
%J Mathematica slovaca
%D 2003
%P 341-349
%V 53
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MASLO_2003__53_4_a2/
%G en
%F MASLO_2003__53_4_a2