| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Interactive Systems: Proceedings, 6. Informatik-Symposium, IBM Germany, Bad Homburg v.d.H., September 1976 | 978-3-540-08141-8 (3-540-08141-0) | 2008 | A. Blaser | |
| Interactive systems: Proceedings, 6th Informatik Symposium, IBM Germany, Bad Homburg v. d. H., September 1976 | 978-0-387-08141-0 (0-387-08141-0) | 1977 | " |
C. E. Hackl · C.H. · Christian Hackl · Christine Stix-Hackl · Christoph Hackl · Christoph M. Hackl · Clemens Hackl