Cirin, Piotr. 2020. β€œAn Analysis of Selected Digital and Financial Indicators in the Polish Banking Sector in 2014–2018”. Krakow Review of Economics and Management Zeszyty Naukowe Uniwersytetu Ekonomicznego W Krakowie, no. 5(983) (July): 89-108. https://doi.org/10.15678/ZNUEK.2019.0983.0506.