PRĘDKI, A. A MULTI-PRODUCT VERSION OF THE DEA+ METHOD. Metody Ilościowe w Badaniach Ekonomicznych, [S. l.], v. 15, n. 2, p. 317–329, 2014. Disponível em: https://qme.sggw.edu.pl/article/view/3694. Acesso em: 24 lis. 2024.