@article{10_4153_CJM_1969_162_0,
     author = {Williams, Kenneth S.},
     title = {Distinct {Values} of a {Polynomial} in {Subsets} of a {Finite} {Field}},
     journal = {Canadian journal of mathematics},
     pages = {1483--1488},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-162-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-162-0/}
}