@article{10_4064_aa99_3_6,
     author = {Andrew Bremner},
     title = {On squares of squares {II}},
     journal = {Acta Arithmetica},
     pages = {289--308},
     publisher = {mathdoc},
     volume = {99},
     number = {3},
     year = {2001},
     doi = {10.4064/aa99-3-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa99-3-6/}
}