%0 Journal Article %A Krystyna Jerzykiewicz %T Algorithm 8. A program to shorten a sequence of sets of integer numbers %J Applicationes Mathematicae %D 1969 %P 357-375 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-11-3-357-375/ %R 10.4064/am-11-3-357-375 %G en %F 10_4064_am_11_3_357_375