@article{IM_1990__101_2_143822,
     author = {Shai Haran},
     title = {Riesz potentials and explicit sums in arithmetic.},
     journal = {Inventiones mathematicae},
     pages = {697--704},
     publisher = {mathdoc},
     volume = {101},
     number = {2},
     year = {1990},
     zbl = {0788.11055},
     url = {http://geodesic.mathdoc.fr/item/IM_1990__101_2_143822/}
}