1. Bosc P. and J. Kacprzyk, Eds. (1995) Fuzziness in Database Management Systems. Physica-Verlag, Heidelberg.
2. Bosc P. and O. Pivert (1992) Fuzzy querying in conventional databases. In L.A. Zadeh and J. Kacprzyk (Eds.): Fuzzy Logic for the Management of Uncertainty. Wiley, New York, pp. 645–671.
3. Chen G.Q. (1998) Fuzzy Logic in Data Modeling - Semantics, Constraints and Database Design. Kluwer, Boston.
4. Dobrzynski W., Kacprzyk J. and S. Zadrozny (1997) An example of fuzzy querying using Microsoft’ Active Server Pages tools. Proc. of 5th EUFIT’97 (Aachen, Germany), 1997, vol. 2, pp. 1181–1185.
5. Kacprzyk J. and S. Zadrozny (1994) Fuzzy querying for Microsoft Access. Proc. of 3~ FUZZ-IEEE Conference (Orlando, USA), Vol. 1, pp. 167–171.