@article{10_4064_aa_17_2_169_183,
     author = {R. Hall},
     title = {On the probability that n and f(n) are relatively prime},
     journal = {Acta Arithmetica},
     pages = {169--183},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1970},
     doi = {10.4064/aa-17-2-169-183},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-17-2-169-183/}
}