Johann Eder Mária Bieliková A Min Tjoa Advances in Databases and Information Systems - 15th International Conference, ADBIS 2011, Vienna, Austria, September 20-23, 2011. Proceedings 6909 2011 Springer Lecture Notes in Computer Science http://dx.doi.org/10.1007/978-3-642-23737-9 978-3-642-23736-2 ADBIS db/conf/adbis/adbis2011.html