%0 Journal Article
%A R. Simpson
%A Doron Zeilberger
%T Necessary conditions for distinct covering systems with square-free moduli
%J Acta Arithmetica
%D 1991
%P 59-70
%V 59
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/aa-59-1-59-70/
%R 10.4064/aa-59-1-59-70
%G en
%F 10_4064_aa_59_1_59_70