@congreso_internacional{455, author = {Enrique Herrera-Viedma and Carlos Porcel}, title = {Using incomplete fuzzy linguistic preference relations to characterize user profiles in recommender systems}, year = {2009}, pages = {90-95}, month = {November 30th - December 2nd}, publisher = {ISDA09, 9th International Conference on Intelligent Systems Design and Applications}, address = {Pisa (Italy)}, }