2002-2002
Varna, Bulgária:  During the visit to the 2002 International Conference: Constructive Function Theory  
Varna, Bulgária:  During the visit to the 2002 International Conference: Constructive Function Theory.   Prof. Sergey M. Nikolsky (at the age of 97) in the middle
Varna, Bulgária:  During the visit to the 2002 International Conference: Constructive Function Theory  
Iambol, Bulgária:  During the visit to the 2002 International Conference: Constructive Function Theory