%0 Journal Article %A Krzysztof J. Szajowski %T Chapter Cover %J Mathematica Applicanda %D 2018 %P 257-258 %V 46 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/ma.v46i2.6415/ %R 10.14708/ma.v46i2.6415 %G pl %F 10_14708_ma_v46i2_6415