Luis Martínez, Luis Gonzaga Pérez, Manuel José Barranco, Macarena EspinillaImproving The Effectiveness of Knowledge Based Recommender Systems Using Incomplete Linguistic Preference Relations
International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems (IJUFKS) special issue: Fuzzy Approaches in Preference Modelling, Decision Making and Applications, vol. 16. World Scientific, pp. 33-56, 2008.