Laurent Ughetto W. Amenel Voglozin Noureddine Mouaddib Database querying with personalized vocabulary using data summaries. 2030-2046 2008 159 Fuzzy Sets and Systems 15 http://dx.doi.org/10.1016/j.fss.2008.02.015 db/journals/fss/fss159.html#UghettoVM08