| Dr. César González-Pérez |
| The Heritage Laboratory (LaPa) |
| Spanish National Research Council (CSIC) |
| Instituto de Estudios Gallegos Padre Sarmiento |
| San Roque, 2 |
| 15704 Santiago de Compostela |
| Spain |
| E-mail cesar.gonzalez-perez@iegps.csic.es |
| Web site http://www.verdewek.com/work |