1. The object-oriented database system manifesto;Atkinson,1990
2. A fuzzy relational inference language;Baldwin;Fuzzy Sets and Systems,1984
3. G. Bordogna, G. Pasi (Eds.), Recent Issues on Fuzzy Databases, Physica-Verlag, Heidelberg, Germany, 2000.
4. P. Bosc, J. Kacprzyk (Eds.), Fuzziness in Database Management Systems, Physica-Verlag, Heidelberg, Germany, 1995.
5. P. Bosc, H. Prade, An introduction to fuzzy set and possibility theory based approaches to the treatment of uncertainty and imprecision in database management systems, in: Proc. 2nd Workshop on Uncertainty Management in Information Systems: From Needs to Solutions, Catalina, California, USA, 1993.