@article{10_4064_aa_89_3_279_282,
     author = {Sukumar Adhikari and Yong-Gao Chen},
     title = {On a question regarding visibility of lattice points, {II}},
     journal = {Acta Arithmetica},
     pages = {279--282},
     year = {1999},
     volume = {89},
     number = {3},
     doi = {10.4064/aa-89-3-279-282},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-89-3-279-282/}
}