%0 Journal Article %A Marc Berger %A Alexander Felzenbaum %A Aviezri Fraenkel %T Necessary condition for the existence of an incongruent covering system with odd moduli %J Acta Arithmetica %D 1985 %P 375-379 %V 45 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-45-4-375-379/ %R 10.4064/aa-45-4-375-379 %G en %F 10_4064_aa_45_4_375_379