| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Disposition mit SAP | 978-3-8362-1221-2 (3-8362-1221-8) | 2009 | Ferenc Gulyássy · Marc Hoppe · Oliver Köhler | |
| Materials Planning with SAP: SAP ERP and SAP APO | 978-1-59229-259-2 (1-59229-259-3) | 2009 | Marc Hoppe · Ferenc Gulyassy · Oliver Köhler |