Participation in International Congresses and Symposia

• Sixth International Graptolite Conference, Graptolite Working Group (IPA) 1998 Madrid, Spain
• International Workshop “Depositional Environments of the Gondwanan and Laurasian Devonian” 26 September-3 October 2005 Turkey
• Jubilee International Conference “80 years Bulgarian Geological Society” 17-18 November 2005 Sofia, Bulgaria