Tzonev, Rossen, Department of Ecology, Faculty of Biology, Sofi a University, 8 Dragan Tzankov Blvd., Sofi a 1421, Bulgaria, Bulgaria

• Hacquetia Vol. 5 No. 1 (2006): Hacquetia - Articles
  The Western-Pontic steppe vegetation in Bulgaria
  Abstract  PDF (Slovenščina)