%0 Journal Article %A Zhang, Jiping %T Finite Groups as the Union of Proper Subgroups %J Serdica Mathematical Journal %D 2006 %P 259-268 %V 32 %N 2-3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SMJ2_2006_32_2-3_a7/ %G en %F SMJ2_2006_32_2-3_a7