Franziska Biegler, Ian McQuillan, Kai Salomaa. An Infinite Hierarchy Induced by Depth Synchronization. In Hing Leung, Giovanni Pighizzini, editors, 8th International Workshop on Descriptional Complexity of Formal Systems - DCFS 2006, Las Cruces, New Mexico, USA, June 21 - 23, 2006. Proceedings. pages 82-93, New Mexico State University, Las Cruces, New Mexico, USA, 2006.
Abstract is missing.