@article{1256047933, author = {Pollington, A. D.}, title = {On the density of sequence $\{n\_{k}\xi\}$}, journal = {Illinois J. Math.}, volume = {23}, number = {4}, year = {1979}, pages = { 511-515}, language = {en}, url = {http://dml.mathdoc.fr/item/1256047933} }
Pollington, A. D. On the density of sequence $\{n_{k}\xi\}$. Illinois J. Math., Tome 23 (1979) no. 4, pp. 511-515. http://gdmltest.u-ga.fr/item/1256047933/