Martin Grohe, Martin Hyland, Johann A. Makowsky, Damian Niwinski. The Ackermann Award 2007. In Jacques Duparc, Thomas A. Henzinger, editors, Computer Science Logic, 21st International Workshop, CSL 2007, 16th Annual Conference of the EACSL, Lausanne, Switzerland, September 11-15, 2007, Proceedings. Volume 4646 of Lecture Notes in Computer Science, pages 589-597, Springer, 2007. [doi]
Abstract is missing.