Authors
Vladimir Emelichev
Belarusian State University, Faculty of Mechanics and Mathematics, Minsk, Belarus
Yury Nikulin
University of Turku, Department of Mathematics and Statistics, Turku, Finland
© 2022 Vladimir Emelichev, Yury Nikulin, published by Systems Research Institute Polish Academy of Sciences
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.