ZIARKO, Łukasz. Statistical methods as a tool to identify bid-rigging: the case of local authorities. Ekonomia i Prawo. Economics and Law, [S. l.], v. 21, n. 3, p. 655–669, 2022. DOI: 10.12775/EiP.2022.035. Disponível em: https://apcz.umk.pl/EiP/article/view/40420. Acesso em: 29 jun. 2025.