“Organizational Affiliation, Age and Training Experience of People Who Train Karate Kyokushin and the Rank of the Most Important Professional Activities of the Coach”. Sport I Turystyka Środkowoeuropejskie Czasopismo Naukowe, vol. 3, no. 2, May 2020, pp. 59-77, https://doi.org/10.16926/sit.2020.03.13.