Operational surveillance of Security Service over sports movement in People’s Republic of Poland in the 80’s. Sport i Turystyka Środkowoeuropejskie Czasopismo Naukowe, [S. l.], v. 15, n. 2, p. 63–76, 2019. DOI: 10.16926/kf.2016.15.12. Disponível em: https://czasopisma.ujd.edu.pl/index.php/sport/article/view/379. Acesso em: 23 sep. 2026.