1. C. Barranco, J. Medina, J. Chamorro-Martínez, J. Soto-Hidalgo, Using a fuzzy object-relational database for colour image retrieval, in: H.L. Larsen, G. Pasi, D.O. Arroyo, T. Andreasen, H. Christiansen (Eds.), FQAS, Lecture Notes in Computer Science, Vol. 4027, Springer, Berlin, 2006, pp. 307–318.
2. A general framework for computing with words in object-oriented programming;Berzal;Internat. J. Uncertainty Fuzziness Knowledge-Based Systems (IJUFKS),2007
3. Managing fuzziness on conventional object-oriented platforms;Berzal;Internat. J. Intelligent Systems,2007
4. A fuzzy object-based data model for imperfect spatial information integrating exact objects and fields;Bordogna;Internat. J. Uncertainty Fuzziness Knowledge Based Systems,2003
5. G. Bordogna, A. Leporati, D. Lucarella, G. Pasi, The fuzzy object-oriented database management system, Recent Issues on Fuzzy Databases, Physica-Verlag, 2000, pp. 209–236.