Stloukalová, Brigita, Tomáš Roztočil, Dana Fialová, and Zdeněk Chlup. 2021. “A Field Research: Evaluation of Efficiency of P.E. Lessons”. Journal of Human Sport and Exercise 10 (1proc):S526-S536. https://doi.org/10.14198/jhse.2015.10.Proc1.48.