@article{10_4064_aa143_3_8,
     author = {Wenpeng Zhang and Zhaoxia Wu},
     title = {A mean value related to the
 {D.} {H.} {Lehmer} problem and {Kloosterman} sums},
     journal = {Acta Arithmetica},
     pages = {291--298},
     publisher = {mathdoc},
     volume = {143},
     number = {3},
     year = {2010},
     doi = {10.4064/aa143-3-8},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa143-3-8/}
}