@article{10_4064_aa155_1_1,
     author = {D. R. Heath-Brown},
     title = {Square-free values of $n^2+1$},
     journal = {Acta Arithmetica},
     pages = {1--13},
     publisher = {mathdoc},
     volume = {155},
     number = {1},
     year = {2012},
     doi = {10.4064/aa155-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa155-1-1/}
}