OLÁH , J. .; POPP , J. .; MÁTÉ, D. .; ARDHI HIDAYAT , Y. . Market structure and concentration ratio: evidence of IT companies in Hungary. Forum Scientiae Oeconomia, [S. l.], v. 7, n. 3, p. 7–18, 2019. DOI: 10.23762/FSO_VOL7_NO3_1. Disponível em: https://ojs.wsb.edu.pl/index.php/fso/article/view/53. Acesso em: 21 mar. 2023.