%O Bibliogr.: 41. p.; Abstract %V 79 %D 2013 %T Covering systems of direct products of elementary p-groups are regular %A KovĂĄcs IstvĂĄn %A Szendrei MĂĄria B. %N 1-2 %P 31-41 %K TermĂŠszettudomĂĄny, Matematika %L acta30861 %J Acta scientiarum mathematicarum