Ehrich, H. - D., K. Drosten, and M. Gogolla,
"Towards an Algebraic Semantics for Database Specification",
Proc 2nd IFIP WG 2.6 Working Conf on Database Semantics ``Data and Knowledge'' (DS-2), Albufeira, Portugal, North-Holland, Amsterdam, pp. 119-135, 1988.
Abstract
Download: 1988Albufeira.pdf (1.08 MB)
Engels, G., M. Gogolla, U. Hohenstein, K. Hülsmann, P. Löhr-Richter, G. Saake, and H. - D. Ehrich,
"Conceptual modelling of database applications using an extended ER model",
Data & Knowledge Engineering, North-Holland, vol. 9, no. 2, pp. 157-204, 1992.
Abstract
Download: 1992DKE.pdf (883.85 KB)