@article{MAN_1935__110_159727,
     author = {A.S. Besicovitch},
     title = {On the density of certain sequences of integers},
     journal = {Mathematische Annalen},
     pages = {336--341},
     publisher = {mathdoc},
     volume = {110},
     year = {1935},
     zbl = {0009.39504},
     url = {http://geodesic.mathdoc.fr/item/MAN_1935__110_159727/}
}