Authors
Beata Pluta
Poland
Marek Konefał
Poland
Paweł Chmura
Poland
Jan Chmura
Poland
© 2017 Marcin Andrzejewski, Beata Pluta, Marek Konefał, Paweł Chmura, Jan Chmura, published by University of Physical Education in Warsaw
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.