The Josef Pilsudski University of Physical Education in Warsaw, Faculty of Physical Education and Sport in Biała Podlaska, Department of Psychology, tel.: +48 83 3428779, fax: +48 83 3428800
Dariusz Gierczuk
The Josef Pilsudski University of Physical Education in Warsaw, Faculty of Physical Education and Sport in Biała Podlaska, Department of Sports Theory