Institution: | 1. Weierstrass Institute for Applied Analysis and Stochastics , Mohrenstrasse 39, Berlin , D-10117 , Germany;2. Ural State University , Lenin Street 51, Ekaterinburg , 620083 , Russia;3. Weierstrass Institute for Applied Analysis and Stochastics , Mohrenstrasse 39, Berlin , D-10117 , Germany |