@article{JEMS_2013_15_4_a6,
     author = {Francesco Cellarosi and Yakov G. Sinai},
     title = {Ergodic properties of square-free numbers},
     journal = {Journal of the European Mathematical Society},
     pages = {1343--1374},
     publisher = {mathdoc},
     volume = {15},
     number = {4},
     year = {2013},
     doi = {10.4171/jems/394},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/394/}
}