@inproceedings{6732, author = {{Place, Thomas and van Rooijen, Lorijn and Zeitoun, Marc}}, booktitle = {{Mathematical Foundations of Computer Science 2013 - 38th International Symposium, (MFCS) 2013, Klosterneuburg, Austria, August 26-30, 2013}}, isbn = {{9783642403125}}, issn = {{0302-9743}}, pages = {{729--740}}, publisher = {{Springer Berlin Heidelberg}}, title = {{{Separating Regular Languages by Piecewise Testable and Unambiguous Languages}}}, doi = {{10.1007/978-3-642-40313-2_64}}, year = {{2013}}, }