| 2010-12-09 | Christian Urban | brought the paper to 20 pages plus one page appendix | file | diff | annotate |
| 2010-11-24 | Christian Urban | implemented concrete suggestion of 3rd reviewer | file | diff | annotate |
| 2010-11-05 | Christian Urban | small typo | file | diff | annotate |
| 2010-10-08 | Christian Urban | tuned | file | diff | annotate |