Joanna Nie┼╝urawska and  Hanna Karaszewska and  Anna Dziadkiewicz,  Attractiveness of Cafeteria Systems as Viewed by Generation Z.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2016, vol. 110(2). 684 - 688
    [viewed 15 October 2019]. Available from: https://publications.waset.org/pdf/10006128.