@article{CMJ_2008_58_3_a4,
     author = {Ganglian, Ren and Wenpeng, Zhang},
     title = {On the mean value of a sum analogous to character sums over short intervals},
     journal = {Czechoslovak Mathematical Journal},
     pages = {651--668},
     year = {2008},
     volume = {58},
     number = {3},
     mrnumber = {2455928},
     zbl = {1174.11067},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2008_58_3_a4/}
}