@article{10_4064_aa107_3_1,
     author = {Yong-Gao Chen and Lin-Feng Cheng},
     title = {Visibility of lattice points},
     journal = {Acta Arithmetica},
     pages = {203--207},
     publisher = {mathdoc},
     volume = {107},
     number = {3},
     year = {2003},
     doi = {10.4064/aa107-3-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa107-3-1/}
}