* This program is based on work by
* Isabella Bierenbaum <bierenbaum@thep.physik.uni-mainz.de> and
* Dirk Kreimer <dkreimer@bu.edu>.
- * For details, please ask for the diploma theses of Isabella Bierenbaum.
+ * For details, please see <http://www.arXiv.org/abs/hep-th/0111192>.
*/
/*