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@inproceedings{abc,
author = {Jens Teubner and Torsten Grust and Sebastian Maneth and Sherif Sakr},
booktitle = {PVLDB},
title = {Dependable cardinality forecasts for XQuery.},
url = {http://www.vldb.org/pvldb/1/1453908.pdf},
year = {2008}
}