TY - JOUR AU - Štefan Porubský TI - On m times covering systems of congruences JO - Acta Arithmetica PY - 1976 SP - 159 EP - 169 VL - 29 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa-29-2-159-169/ DO - 10.4064/aa-29-2-159-169 LA - en ID - 10_4064_aa_29_2_159_169 ER -