THM-NET: an approach to office systems modeling. - Angelika Horndasch; Rudi Studer (ACM Conference on Computer Science, 1985)

Modeling Static and Dynamic Aspects of Information Systems. - Rudi Studer; Angelika Horndasch (DS-1, 1985)

An Approach to Conceptual Schema Design of Information Systems. - Angelika Horndasch; Rudi Studer; Ramin Yasdi (TFAIS, 1985)