1. Department of Mathematical Analysis and Theory of Functions, Tomsk State University, Tomsk, Russia
2. Division for Mathematics and Computer Sciences, Tomsk Polytechnic University, Tomsk, Russia
3. Laboratoire de Mathématiques Raphael Salem, Université de Rouen, Rouen, Cedex France
4. International Laboratory of Statistics of Stochastic Processes and Quantitative Finance, Tomsk State University, Tomsk, Russia