Xin Luna Dong M. Tamer Özsu Proceedings of the ACM SIGMOD/PODS PhD Symposium 2012, Scottsdale, AZ, USA, May 20, 2012 ACM SIGMOD/PODS PhD Symposium 2012 978-1-4503-1326-1 http://dl.acm.org/citation.cfm?id=2213598 db/conf/sigmod/phd2012.html