@article{10_4153_CMB_1977_015_2,
     author = {Fine, Benjamin},
     title = {A {Note} on the {Two-Square} {Theorem}},
     journal = {Canadian mathematical bulletin},
     pages = {93--94},
     year = {1977},
     volume = {20},
     number = {1},
     doi = {10.4153/CMB-1977-015-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-015-2/}
}