@inproceedings {4622,
	title = {When Close Enough Is Good Enough: Approximate Positional Indexes For Efficient Ranked Retrieval},
	booktitle = {International Conference on Information and Knowledge Management (CIKM)},
	year = {2011},
	doi = {10.1145/2063576.2063873},
	author = {Tamer Elsayed and Jimmy Lin and Donald Metzler}
}
