@article{10_4153_CJM_1979_053_2,
     author = {Montgomery, H. L. and Vaughan, R. C.},
     title = {Mean {Values} of {Character} {Sums}},
     journal = {Canadian journal of mathematics},
     pages = {476--487},
     year = {1979},
     volume = {31},
     number = {3},
     doi = {10.4153/CJM-1979-053-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-053-2/}
}