%0 Journal Article %A J. Słomiński %T On systems of mappings between models %J Colloquium Mathematicum %D 1967 %P 247-268 %V 17 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-17-2-247-268/ %R 10.4064/cm-17-2-247-268 %G en %F 10_4064_cm_17_2_247_268