@inproceedings {4418,
	title = {Supporting Ad-Hoc Ranking Aggregates},
	booktitle = {ACM International Conference on Management of Data (SIGMOD)},
	year = {2006},
	doi = {10.1145/1142473.1142481},
	author = {Chengkai Li and Kevin Chen-Chuan Chang and Ihab Ilyas}
}
