@article{JTNB_2003__15_1_33_0,
     author = {Cogdell, James W.},
     title = {On sums of three squares},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {33--44},
     publisher = {Universit\'e Bordeaux I},
     volume = {15},
     number = {1},
     year = {2003},
     mrnumber = {2018999},
     zbl = {1050.11043},
     language = {en},
     url = {http://www.numdam.org/item/JTNB_2003__15_1_33_0/}
}