Abstraction Capabilities and Invariant Properties Modelling within the Entity-Relationship Approach. - Peter Scheuermann; Gerd Schiffner; H. Weber (ER, 1979)

Multiple Views and Abstractions with an Extended-Entity-Relationship Model. - Gerd Schiffner; Peter Scheuermann (Comput. Lang., 1979)

On a Specification and Performance Evaluation Model for Multicomputer Database Machines. - Gerd Schiffner; Peter Scheuermann; S. Seehusen; Herbert Weber (IWDM, 1983)

A specification and performance evaluation model for multicomputer database machines. - Gerhard Schiffner (1984)