%0 Journal Article %A Tadeusz Śliwa %T Some remarks on the interface in the filtration problem %J Colloquium Mathematicum %D 1980 %P 339-344 %V 43 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-43-2-339-344/ %R 10.4064/cm-43-2-339-344 %G en %F 10_4064_cm_43_2_339_344