1. Atkinson, M.; Bancilhon, F.; DeWitt, D.; Dittrich, K.; Maier, D.; Zdonik, S.: The Object-Oriented Database System Manifesto (A Political Pamphlet). Proc. DOOD 89, Kyoto/Japan, December 1989
2. Bertino, E. et al.: Integration of Heterogeneous Database Applications Through an Object-Oriented Interface. Information Systems, Vol. 14, No. 5, 1989
3. Bright, M.W.; Hurson, A.R.; Pakzad, S.H.: A Taxonomy and Current Issues in Multidatabase Systems. IEEE Computer, Volume 25, No. 3, March 1992
4. Dittrich, K.R.; Gotthard, W.; Lockemann, P.C.: DAMOKLES - a Database System for Software Engineering. Lecture Notes in Computer Science, Vol. 244, Springer, 1987
5. Eliassen, F.; Karlsen, R.: Interoperability and Object Identity. SIGMOD Record, Vol. 20, No. 4, December 1991