Divyakant Agrawal Amr El Abbadi Fatih Emekçi Ahmed Metwally Database Management as a Service: Challenges and Opportunities. 1709-1716 2009 ICDE http://dx.doi.org/10.1109/ICDE.2009.151 conf/icde/2009 db/conf/icde/icde2009.html#AgrawalAEM09