On estimation in the multidimensional Gaussian model Bogusława Bednarek-Kozek — 1973 Applicationes Mathematicae
On the robustness of properties characterizing the normal distribution Boguslawa Bednarek-Kozek; A. Kozek — 1972 Applicationes Mathematicae
Stability, sensitivity and sensitivity of characterizations Bogusława Bednarek-Kozek; Andrzej Kozek — 1980 Banach Center Publications