@article{10_4153_CMB_1987_037_4,
     author = {Chalk, J. H. H.},
     title = {On {Incomplete} {Character} {Sums} to a {Prime-Power} {Modulus}},
     journal = {Canadian mathematical bulletin},
     pages = {257--266},
     year = {1987},
     volume = {30},
     number = {3},
     doi = {10.4153/CMB-1987-037-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1987-037-4/}
}