Zaytsev, V., Manucharjan, S., Prusik, K., Prusik, K., Cieslicka, M., & Szark-Eckardt, M. (2013). Methodology of physical recreation: problems, experience, recommendations. Pedagogics, Psychology, Medical-Biological Problems of Physical Training and Sports, 17(4), 13–20. Retrieved from https://sportpedagogy.org.ua/index.php/PPS/article/view/551