@article{1077378463,
author = {McConnel, Robert},
title = {Functions over finite fields preserving $m$-${\rm th}$ powers},
journal = {Duke Math. J.},
volume = {36},
number = {1},
year = {1969},
pages = { 465-472},
language = {en},
url = {http://dml.mathdoc.fr/item/1077378463}
}
McConnel, Robert. Functions over finite fields preserving $m$-${\rm th}$ powers. Duke Math. J., Tome 36 (1969) no. 1, pp. 465-472. http://gdmltest.u-ga.fr/item/1077378463/