@article{10_4064_aa147_3_1,
     author = {Dmitry A. Badziahin and Alan K. Haynes},
     title = {A note on {Farey} fractions with
 denominators in arithmetic progressions},
     journal = {Acta Arithmetica},
     pages = {205--215},
     publisher = {mathdoc},
     volume = {147},
     number = {3},
     year = {2011},
     doi = {10.4064/aa147-3-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa147-3-1/}
}