Anusz A. The problem of defining the relevant market in the case of multilateral markets – based on the example of digital entrepreneurs operating in two-sided markets. 10.14746/rpeis [Internet]. 2021 Mar. 30 [cited 2024 Nov. 22];83(1):187-200. Available from: https://pressto.amu.edu.pl/index.php/rpeis/article/view/23546