%0 Journal Article %A Masae Sato %A Ryotaro Sato %T A simple proof of the Chui-Smith theorem on Landau's problem %J Colloquium Mathematicum %D 1982 %P 119-122 %V 47 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-47-1-119-122/ %R 10.4064/cm-47-1-119-122 %G en %F 10_4064_cm_47_1_119_122