@article{10_4064_aa147_2_6,
     author = {Jean Bourgain and Todd Cochrane and Jennifer Paulhus and Christopher Pinner},
     title = {On the parity of $k$-th powers modulo $p$.
 {A} generalization of a problem of {Lehmer}},
     journal = {Acta Arithmetica},
     pages = {173--203},
     publisher = {mathdoc},
     volume = {147},
     number = {2},
     year = {2011},
     doi = {10.4064/aa147-2-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa147-2-6/}
}