| Wed, 27 Jul 2011 15:29:39 +0000 | urbanc | latest version of the journal paper | file | diff | annotate |
| Wed, 27 Jul 2011 12:32:28 +0000 | urbanc | polished the introduction | file | diff | annotate |
| Tue, 26 Jul 2011 18:12:07 +0000 | urbanc | more on the section about derivatives | file | diff | annotate |