Daniel Puciato and  Piotr Oleśniewicz and  Julita Markiewicz-Patkowska and  Krzysztof Widawski and  Michał Rozpara and  Władysław Mynarski and  Agnieszka Gawlik and  Małgorzata Dębska and  Soňa Jandová,  Socio-Economic Determinants of Physical Activity of Non-Manual Workers, Including the Early Senior Group, from the City of Wroclaw in Poland.   journal   = {International Journal of Sport and Health Sciences}, [online]. World Academy of Science, Engineering and Technology.
    October 2016, vol. 119(11). 3678 - 3683
    [viewed 25 February 2020]. Available from: https://publications.waset.org/pdf/10005806.