%0 Journal Article %A Blatný, Petr %A Bidlo, Radek %A Meduna, Alexander %T Automata with two-sided pushdowns defined over free groups generated by reduced alphabets %J Kybernetika %D 2007 %P 265-278 %V 43 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_2007__43_3_a0/ %G en %F KYB_2007__43_3_a0