%0 Journal Article %A Redakor Redaktor %T Summaries %J Mathematica Applicanda %D 1985 %P 229-232 %V 13 %N 26 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/ma.v13i26.1658/ %R 10.14708/ma.v13i26.1658 %G pl %F 10_14708_ma_v13i26_1658