FURKOVÁ, A.; SURMANOVÁ, K. Stochastic frontier analysis of regional competitiveness. Metody Ilościowe w Badaniach Ekonomicznych, [S. l.], v. 12, n. 1, p. 67–76, 2011. Disponível em: https://qme.sggw.edu.pl/article/view/3097. Acesso em: 22 lis. 2024.