RÓJ, Justyna. Competition Measurement of Hospitals in Poland: the Herfindahl-Hirschman Index Approach. Ekonomika, [S. l.], v. 95, n. 1, p. 166–181, 2016. DOI: 10.15388/Ekon.2016.1.9912. Disponível em: https://www.journals.vu.lt/ekonomika/article/view/9912.. Acesso em: 5 may. 2024.