Alexandra O. Savinkina ,  A Test to Express Diagnostic Cohesion of Football Team .   journal   = {International Journal of Sport and Health Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2017, vol. 125(5). 1110 - 1113
    [viewed 12 May 2021]. Available from: https://publications.waset.org/pdf/10006960.