@article{bwmeta1.element.bwnjournal-article-aav14i1p113bwm,
author = {Whyburn, Clifton},
title = {The density of power residues and non-residues in subintervals [1, $\surd$p]},
journal = {Acta Arithmetica},
volume = {13},
year = {1968},
pages = {113-116},
zbl = {0182.37403},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-aav14i1p113bwm}
}
Whyburn, Clifton. The density of power residues and non-residues in subintervals [1, √p]. Acta Arithmetica, Tome 13 (1968) pp. 113-116. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-aav14i1p113bwm/