@misc{Schefke_Tomasz_Improving,
 author={Schefke, Tomasz and Gronek, Piotr},
 copyright={Akademia Wychowania Fizycznego w Poznaniu},
 howpublished={online},
 publisher={Akademia Wychowania Fizycznego w Poznaniu},
 language={eng},
 type={artykuł},
 title={Improving attentional processes sport: classifications of exercises and principles of development of attentional skills},
 keywords={attentional skills development, principles and exercises},
}