SKRZYPEK, Jurand; TROJAK, Mariusz Radosław. Measuring the efficiency of Polish banks using stochastic frontier approach. Acta Universitatis Lodziensis. Folia Oeconomica, [S. l.], v. 3, n. 303, 2014. Disponível em: https://www.czasopisma.uni.lodz.pl/foe/article/view/194. Acesso em: 6 dec. 2025.