%0 Journal Article
%A Burshtein, Nechemia
%A Schönheim, Johanan
%T On exactly covering systems of congruences having moduli occurring at most twice
%J Czechoslovak Mathematical Journal
%D 1974
%P 369-372
%V 24
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1974.101250/
%R 10.21136/CMJ.1974.101250
%G en
%F 10_21136_CMJ_1974_101250