Ostasiewicz, Katarzyna, i Achille Vernizzi. 2017. „DECOMPOSITION AND NORMALIZATION OF ABSOLUTE DIFFERENCES, WHEN POSITIVE AND NEGATIVE VALUES ARE CONSIDERED:APPLICATIONS TO THE GINI COEFFICIENT”. Metody Ilościowe W Badaniach Ekonomicznych 18 (3):472-91. https://doi.org/10.22630/MIBE.2017.18.3.44.