Oláh, J., Popp, J., Máté, D.,
Yusmar, A.:
Market structure and concentration ratio: Evidence of Information Technology companies in Hungary.
In: 6th International Scientific Conference New Trends in Management and Production - Book of Abstracts Engineering - Regional, Cross-border and Global Perspectives É. Ed.: Dabrowa Górnicza, WSB, University, Brenna, Lengyelorszag, 43, 2019.