%0 Journal Article %A W. OkrasiƄski %T On a certain nonlinear equation %J Colloquium Mathematicum %D 1980 %P 345-349 %V 43 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-43-2-345-349/ %R 10.4064/cm-43-2-345-349 %G en %F 10_4064_cm_43_2_345_349