@Inproceedings{EPTCS41.1, author = {Baeten, Jos C. M. and Luttik, Bas and Muller, Tim and van Tilburg, Paul}, year = {2010}, title = {Expressiveness modulo Bisimilarity of Regular Expressions with Parallel Composition (Extended Abstract)}, editor = {Fr\"oschle, Sibylle and Valencia, Frank D.}, booktitle = {{\rm Proceedings 17th International Workshop on} Expressiveness in Concurrency , {\rm Paris, France, August 30th, 2010}}, series = {Electronic Proceedings in Theoretical Computer Science}, volume = {41}, publisher = {Open Publishing Association}, pages = {1-15}, doi = {10.4204/EPTCS.41.1}, }