Matthew Hague, Andrzej S. Murawski, C.-H. Luke Ong, Olivier Serre. Collapsible Pushdown Automata and Recursion Schemes. In Proceedings of the Twenty-Third Annual IEEE Symposium on Logic in Computer Science, LICS 2008, 24-27 June 2008, Pittsburgh, PA, USA. pages 452-461, IEEE Computer Society, 2008. [doi]
Abstract is missing.