@Article{ authors = " Miroslav Kopecký, Ryszard Asienkiewicz", title = "Comparison of dynamics of development of physical height, mass and explosive power capacity of lower limbs in boys from the Olomouc region and Zielona Góra ", journal = "Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna", issue = "2005 / Tom 6", pages = "129 - 136" }

@Article{ authors = " Miroslav Kopecký", title = "Assessment of hypermobility and muscular stiffness in children of younger and older school age ", journal = "Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna", issue = "2005 / Tom 6", pages = "137 - 144" }