@article{10_4064_aa144_2_3,
     author = {Kui Liu},
     title = {On the distribution of primitive {Pythagorean} triangles},
     journal = {Acta Arithmetica},
     pages = {135--150},
     publisher = {mathdoc},
     volume = {144},
     number = {2},
     year = {2010},
     doi = {10.4064/aa144-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa144-2-3/}
}