Cynarski, W., Pawelec, P., Yu, J.-H., Slopecki, J., Bielec, G., & Kubala, K. (2018). Young people practicing martial arts and their perception of success. Pedagogics, Psychology, Medical-Biological Problems of Physical Training and Sports, 22(5), 231–236. https://doi.org/10.15561/18189172.2018.0502