Christos A. Kapoutsis. Nondeterminism Is Essential in Small 2FAs with Few Reversals. In Luca Aceto, Monika Henzinger, Jiri Sgall, editors, Automata, Languages and Programming - 38th International Colloquium, ICALP 2011, Zurich, Switzerland, July 4-8, 2011, Proceedings, Part II. Volume 6756 of Lecture Notes in Computer Science, pages 198-209, Springer, 2011. [doi]
Abstract is missing.