TY - JOUR AU - Marc Berger AU - Alexander Felzenbaum AU - Aviezri Fraenkel TI - Necessary condition for the existence of an incongruent covering system with odd moduli II JO - Acta Arithmetica PY - 1987 SP - 73 EP - 79 VL - 48 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa-48-1-73-79/ DO - 10.4064/aa-48-1-73-79 LA - en ID - 10_4064_aa_48_1_73_79 ER -