@misc{shant:08wn2, AUTHOR = {Shant Karakashian and Jos{\'e} Luis Ambite and Berthe Y.\ Choueiry }, TITLE = {{Size Estimation of Query Results Using Histograms}}, MONTH = dec, YEAR = 2008, HOWPUBLISHED = {Working Note of the Constraint Systems Laboratory (UNL)}, NOTE = {December, 2008}}