@Article{452585,
     author = "Jiří Michal",
     title = "Lifestyle and physical activity of primary school pupils",
     year =  2015,
     volume =  14,
     number =  1,
     journal =  Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna,
     pages =  s. 141-149,
    }