@article{10_4064_aa_39_3_265_267,
     author = {R. Kaufman},
     title = {On the theorem of {Jarn{\'\i}k} and {Besicovitch}},
     journal = {Acta Arithmetica},
     pages = {265--267},
     publisher = {mathdoc},
     volume = {39},
     number = {3},
     year = {1981},
     doi = {10.4064/aa-39-3-265-267},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-39-3-265-267/}
}