BEJGER, Sylwester. Unreliability of markets – collusion of players. Detection methods in the light of the competition policy. Ekonomia i Prawo. Economics and Law, [S. l.], v. 5, n. 1, p. 147–160, 2009. DOI: 10.12775/EiP.2009.010. Disponível em: https://apcz.umk.pl/EiP/article/view/EiP.2009.010. Acesso em: 24 feb. 2025.