1. Agarwal, S., Keller, A.M., Wiederhold, G. Krichna, S.: Flexible relation: an approach for integrating data from multiple, possibly inconsistent databases. Eleventh International Conference on Data Engineering, IEEE (1995)
2. Arens, Y., Knoblock, C.A., Shen, W.M.: “Query Reformulation for dynamic information integration. International Journal on Intelligent and Cooperative Information Systems (6) 2/3, (1996)
3. Calvanese, D., De Giacomo, G., Lenzerini, M., Nardi, D., Rosati, R.: Source Integration: conceptual modeling and reasoning support. Proceedings of the 6th Internat. Conf. In Cooperative Information Systems, (CoopIS’98) (1998)
4. Chawathe, S., Garcia-Molina, H., Hammer, J., Ireland, K., Papakonstantinou, Y., Ullman J., Widom J.: The TSIMMIS project: Integration of Heterogeneous Information Sources,” IPSJ’94 (1994)
5. Cluet, S., Delobel, C., Simeon, J., Katarzyna, S.: Your Mediators Need Data Conversion!. ACM SIGMOD, Seattle (1998)