@congreso_internacional{452, author = {Manuel José Barranco and Luis Gonzaga Pérez and Luis Martínez}, title = {A Linguistic Framework for Collaborative and Knowledge-based Filtering: How to Refine Collaborative Filtering Recommendations}, year = {2009}, volume = {2}, pages = {369-374}, month = {November 27-28th}, publisher = {The 4th International Conference on Intelligent System and Knowledge Engineering (ISKE 2009)}, address = {University of Hasselt, Hasselt (Belgium)}, }