Wong Karianto, Christof Löding. Unranked Tree Automata with Sibling Equalities and Disequalities. In Lars Arge, Christian Cachin, Tomasz Jurdzinski, Andrzej Tarlecki, editors, Automata, Languages and Programming, 34th International Colloquium, ICALP 2007, Wroclaw, Poland, July 9-13, 2007, Proceedings. Volume 4596 of Lecture Notes in Computer Science, pages 875-887, Springer, 2007. [doi]
Abstract is missing.