1. Abrial J.R., Data semantics, in Data Base Management, Klimbie J.W., Koffeman K.L (eds), North-Holland, pp 1–59 (1974).
2. Barthès J. P., Vayssade M., Miaczynska-Znamierowska M., Property Driven Data Base, 6th IJCAI, Tokyo (1979).
3. Barthès J.P., MGF Version 2.0M: Moniteur de Gestion de Fichiers, UTC/GI/DI/85–12, Dec. (1985).
4. Barthès J. P., MOSS: a multi-user object environment, 2nd Symposium on AI, Monterrey, Mexico, Oct. (1989).
5. Barthès J.P., Anota P., El Dahshan K., An Experience in Adding Persistence to Intelligent CAD Environments, in Intelligent CAD Systems, ten Hagen P.J.W., Veerkamp P.J. (eds), Springer Verlag (1990).