Luís Caires Vasco Thudichum Vasconcelos CONCUR 2007 - Concurrency Theory, 18th International Conference, CONCUR 2007, Lisbon, Portugal, September 3-8, 2007, Proceedings CONCUR Lecture Notes in Computer Science 4703 Springer 2007 978-3-540-74406-1 db/conf/concur/concur2007.html