Martin Kutrib, Andreas Malcher, Matthias Wendlandt. States and Heads Do Count for Unary Multi-head Finite Automata. In Hsu-Chun Yen, Oscar H. Ibarra, editors, Developments in Language Theory - 16th International Conference, DLT 2012, Taipei, Taiwan, August 14-17, 2012. Proceedings. Volume 7410 of Lecture Notes in Computer Science, pages 214-225, Springer, 2012. [doi]
Abstract is missing.