KITAGAWA, T. The mathematical model of meaning and its application to multidatabase systems. Proc. 3rd IEEE International Workshop on Research Issues on Data Engineering: Interperability in Multidatabase Systems. 1993, 130-135
KIYOKI, Y. A metabatabase system for supporting semantic interoperability in multidatabases. Information Modelling and Knowledge Bases. 1993, vol.V, 287-298