@article{10_4064_aa129_3_1,
     author = {Hong-Quan Liu},
     title = {On the estimates of double exponential sums},
     journal = {Acta Arithmetica},
     pages = {203--247},
     publisher = {mathdoc},
     volume = {129},
     number = {3},
     year = {2007},
     doi = {10.4064/aa129-3-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa129-3-1/}
}