%0 Journal Article %A Stephen Cohen %T Value sets of functions over finite fields %J Acta Arithmetica %D 1981 %P 339-359 %V 39 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-39-4-339-359/ %R 10.4064/aa-39-4-339-359 %G en %F 10_4064_aa_39_4_339_359