@article{10_4064_aa_39_4_339_359,
     author = {Stephen Cohen},
     title = {Value sets of functions over finite fields},
     journal = {Acta Arithmetica},
     pages = {339--359},
     publisher = {mathdoc},
     volume = {39},
     number = {4},
     year = {1981},
     doi = {10.4064/aa-39-4-339-359},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-39-4-339-359/}
}