Participation in international congresses and symposia:

• 1980 - 6th Danube-European Conf. on SMFE, Varna, Bulgaria
• 1985 - Int. Symp. "Palaeoecology and palaeohydrology of the Balkan peninsula and adjacent areas", Varna, Bulgaria
• 1989 - XIV CBGA Congress, Sofia, Bulgaria
• 1994 - 19th Session of International Seminars on Disarmament Technologies, Erice, Italy
• 1995 - UNESCO/IUGS/COGEOENVIRONMENT Workshop on Geoscience for Environmental Planning, Matrahaza, Hungary
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