NIEDZIÓŁKA, Paweł and KORZEB, Zbigniew. Cost efficiency in commercial banking in Poland. Linear ordering approach . Ekonomia i Prawo. Economics and Law. Online. 30 December 2024. Vol. 23, no. 4, pp. 539 - 558. [Accessed 4 July 2025]. DOI 10.12775/EiP.2024.027.