@article{10_4153_CMB_1959_014_7,
     author = {Chalk, J.H.H. and Erdos, P.},
     title = {On the {Distribution} of {Primitive} {Lattice} {Points} in the {Plane}},
     journal = {Canadian mathematical bulletin},
     pages = {91--96},
     year = {1959},
     volume = {2},
     number = {2},
     doi = {10.4153/CMB-1959-014-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1959-014-7/}
}