@article{10_4064_aa130_1_1,
     author = {Huaning Liu and Wenpeng Zhang},
     title = {Hybrid mean value for a generalization
 of a problem of {D.} {H.} {Lehmer}},
     journal = {Acta Arithmetica},
     pages = {1--17},
     publisher = {mathdoc},
     volume = {130},
     number = {1},
     year = {2007},
     doi = {10.4064/aa130-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa130-1-1/}
}