Markus Holzer, Pierre McKenzie. Alternating and Empty Alternating Auxiliary Stack Automata. In Mogens Nielsen, Branislav Rovan, editors, Mathematical Foundations of Computer Science 2000, 25th International Symposium, MFCS 2000, Bratislava, Slovakia, August 28 - September 1, 2000, Proceedings. Volume 1893 of Lecture Notes in Computer Science, pages 415-425, Springer, 2000. [doi]
Abstract is missing.