, Geological Institute, Bulgarian Academy of Sciences, Bulgaria

• Bulletin of the Geological Society of Greece Vol. 34 No. 1 (2001): 9th International Conference of the Geological Society of Greece - General and Structural Geology
  Quaternary geology, geomorphology and tectonics in the Ogosta river valley system, the Danubian plain (Bulgaria)
  Abstract  PDF
• Bulletin of the Geological Society of Greece Vol. 40 No. 3 (2007): 11th International Conference of the Geological Society of Greece - Natural Environment and Anthropogenic Activities
  Heavy metal and metalloid concentration dynamics in mine and surface waters in the vicinity of Chiprovtsi and Martinovo mines, Northwestern Bulgaria
  Abstract  PDF