@article{10_4064_aa_40_2_213_215,
     author = {John Ewell},
     title = {On the counting function for sums of two squares},
     journal = {Acta Arithmetica},
     pages = {213--215},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1981},
     doi = {10.4064/aa-40-2-213-215},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-40-2-213-215/}
}