University School of Physical Education, Poznan, Poland
Bibliografia
[1] Deutscher Tennis-Bund, Tennis-Lehrplan, Bd.1, Technik und Taktik, München, BLV Verlagsgesell¬schaft mbH 1995.
[2] Crespo M., Reid M., Concentration for High Performance Players, Coach Education Series (Powerpoint Presentation), International Tennis Federation 2009.
[3] German Tennis Association, Tennis Course. Volume 1. Techniques and Tactics, Munich, Barron's Educational Series 2000.