@misc{Szeklicki_Robert_Level,
 author={Szeklicki, Robert},
 copyright={Akademia Wychowania Fizycznego w Poznaniu},
 howpublished={online},
 publisher={Akademia Wychowania Fizycznego w Poznaniu},
 language={eng},
 type={artykuł},
 title={Level of education, marital status and social contacts as determinants of habitual physical activity among elderly men},
}