Dominiak, Joanna. “Modern Services: Terminological Considerations and the Characteristic Features of Their Role in Socio-Economic Development”. Quaestiones Geographicae 37, no. 2 (June 15, 2018): 17–25. Accessed June 26, 2022. https://pressto.amu.edu.pl/index.php/qg/article/view/17008.