1. SQLf: a relational database language for fuzzy querying;Bosc;IEEE Trans. FS,1995
2. Flexible queries in relational databases – the example of the division operator;Bosc;Theor. Comput. Sci.,1997
3. On the primitivity of the division of fuzzy relations;Bosc;Int. J. Soft Comput.,1998
4. A relational model of data for large shared data banks;Codd;Commun. ACM,1970
5. J.C. Cubero, J.M. Medina, O. Pons, M.A. Vila, The generalized selection: an alternative way for the quotient operations in fuzzy relational databases, in: Proceedings of the 5th Conference on Information Processing and the Management of Uncertainty (IPMU’94), 1994, pp. 23–30.