KOSZEL, Maciej; BARTKOWIAK, Piotr. Types of Co-Opetition among Local Government Units in Polish Metropolitan Areas. Studia Oeconomica Posnaniensia, Poznan, Polska, v. 5, n. 9, p. 21–36, 2017. DOI: 10.18559/SOEP.2017.9.2. Disponível em: https://journals.ue.poznan.pl/soep/article/view/3724. Acesso em: 3 sep. 2026.