Media type: E-Article Title: Mathematical Foundations of Computer Science 2013: Separating Regular Languages by Piecewise Testable and Unambiguous Languages Contributor: Place, Thomas; van Rooijen, Lorijn; Zeitoun, Marc Published: Springer Berlin Heidelberg, 2013 Published in: Mathematical Foundations of Computer Science 2013 (2013), Seite 729-740 Language: Not determined DOI: 10.1007/978-3-642-40313-2_64 ISBN: 9783642403125; 9783642403132 ISSN: 0302-9743; 1611-3349 Origination: Footnote: