%0 Journal Article %A Małgorzata Średnicka %A Krzysztof J. Szajowski %T Operation comfort vs. the importance of system components %J Mathematica Applicanda %D 2020 %P 191-226 %V 48 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/ma.v48i2.7058/ %R 10.14708/ma.v48i2.7058 %G pl %F 10_14708_ma_v48i2_7058