1. Version support for engineering database systems
2. [DÖ 76] Dörner D.: Problem solving as information processing Kohlhammer-Verlag Stuttgart 1976. [DÖ 76] Dörner D.: Problem solving as information processing Kohlhammer-Verlag Stuttgart 1976.
3. [ISO 91] International Organization for Standardization: Product Data Representation and Exchange-Part 44 Product Structure Configuration ISO CD 10303-44 August 1991 und Part 203 Application Protocol: Configuration Controlled Design ISO CD 10303-203 September 1991. [ISO 91] International Organization for Standardization: Product Data Representation and Exchange-Part 44 Product Structure Configuration ISO CD 10303-44 August 1991 und Part 203 Application Protocol: Configuration Controlled Design ISO CD 10303-203 September 1991.
4. Toward a unified framework for version modeling in engineering databases