%0 Journal Article %A Bebják, Andrej %A Štefáneková, Ivana %T Nondeterminism is essential for reversal-bounded two-way multihead finite automata %J Kybernetika %D 1988 %P 65-71 %V 24 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1988__24_1_a7/ %G en %F KYB_1988__24_1_a7