@article{10_4064_aa169_2_4,
     author = {Julia Brandes},
     title = {Sums and differences of power-free numbers},
     journal = {Acta Arithmetica},
     pages = {169--180},
     publisher = {mathdoc},
     volume = {169},
     number = {2},
     year = {2015},
     doi = {10.4064/aa169-2-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa169-2-4/}
}