@misc{Śliwowski_Robert_Changes,
 author={Śliwowski, Robert and Laurentowska, Maria and Michalak, Edyta and Wieczorek, Andrzej and Wieczorek, Jacek},
 copyright={Akademia Wychowania Fizycznego w Poznaniu},
 howpublished={online},
 publisher={Akademia Wychowania Fizycznego w Poznaniu},
 language={eng},
 type={artykuł},
 title={Changes in anaerobic performance in young football players in an annual training cycle},
}