Pavol Duris, Juraj Hromkovic. Multihead Finite State Automata and Concatenation. In Mogens Nielsen, Erik Meineche Schmidt, editors, Automata, Languages and Programming, 9th Colloquium, Aarhus, Denmark, July 12-16, 1982, Proceedings. Volume 140 of Lecture Notes in Computer Science, pages 176-186, Springer, 1982.
Abstract is missing.