@article{GDZPPN002187914,
title = {On the distribution of k-th power non residues in the interval [1, pa], ... .},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {258},
year = {1973},
pages = {178-180},
zbl = {0275.10006},
url = {http://dml.mathdoc.fr/item/GDZPPN002187914}
}
Hudson, Richard H. On the distribution of k-th power non residues in the interval [1, pa], ... .. Journal für die reine und angewandte Mathematik, Tome 258 (1973) pp. 178-180. http://gdmltest.u-ga.fr/item/GDZPPN002187914/