@congreso_internacional{481, author = {Enrique Herrera-Viedma and A.G López and S Alonso and Carlos Porcel and Francisco Javier Cabrerizo}, title = {A Linguistic Multi-level Weighted Query Language to Represent User Information Needs}, year = {2007}, pages = {1321-1326}, month = {July 23-26th}, publisher = {Proceedings of the 2007 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE 2007)}, address = {IEEE, London (UK)}, }