@misc{10_4153_CMB_1988_050_1,
     title = {On the {Constant} in the {P\'olya-Vinogradov} {Inequality}},
     journal = {Canadian mathematical bulletin},
     pages = {347--352},
     year = {1988},
     volume = {31},
     number = {3},
     doi = {10.4153/CMB-1988-050-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1988-050-1/}
}