| Comparative Palaeoethnobotanical Study of the Vegetation History and the Development of the Prehistoric Landuse in Bulgaria (in German) by Elena Marinova 2001, Bonn |
| Click here to download the main part of the thesis without the supplements: |
| A dissertation presented to the Faculty of Mathematics and Nautral Sciences of the University of Bonn, obtainment of the degree Doctor rerum naturalium (Dr. rer.nat.) |
| Pollendiagram "Durankulak -3" first part and second part |
 |
| ::::::::: |