@misc{Bronikowski_Michał_The,
 author={Bronikowski, Michał},
 copyright={Akademia Wychowania Fizycznego w Poznaniu},
 howpublished={online},
 publisher={Akademia Wychowania Fizycznego w Poznaniu},
 language={eng},
 type={artykuł},
 title={The amount of moderate-to-vigorous intensity during physical education classes in Poland},
 keywords={moderate-to-vigorous activity, heart rate reserve, cardio-respiratory fitness, adolescents},
}