@article{10_4064_aa_88_3_289_297,
     author = {Andrew Bremner},
     title = {On squares of squares},
     journal = {Acta Arithmetica},
     pages = {289--297},
     publisher = {mathdoc},
     volume = {88},
     number = {3},
     year = {1999},
     doi = {10.4064/aa-88-3-289-297},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-88-3-289-297/}
}