Nishant Kapoor Gautam Das Vagelis Hristidis S. Sudarshan Gerhard Weikum STAR: A System for Tuple and Attribute Ranking of Query Answers. 1483-1484 2007 conf/icde/2007 ICDE http://dx.doi.org/10.1109/ICDE.2007.369044 db/conf/icde/icde2007.html#KapoorDHSW07