Analyst Research
| Institute | Ranking | Date |
| Equinet | Buy | June 20, 2008 |
| GSC Research | Buy | April 14, 2008 |
| Kayenburg | Overweight | January 18, 2008 |
| GSC Research | Buy | December 4, 2007 |
| GSC Research | Buy | May 30, 2007 |
| Kayenburg | Overweight | April 24, 2007 |
All reports are only available in German.