A short proof of Fermat's two-square theorem given by János Bolyai.
Kiss, Elemér
Mathematica Pannonica, Tome 8 (1997), p. 293-295 / Harvested from The Electronic Library of Mathematics
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Publié le : 1997-01-01
EUDML-ID : urn:eudml:doc:230784 
@article{01261233,
     title = {A short proof of Fermat's two-square theorem given by J\'anos Bolyai.},
     journal = {Mathematica Pannonica},
     volume = {8},
     year = {1997},
     pages = {293-295},
     zbl = {0909.01004},
     language = {en},
     url = {http://dml.mathdoc.fr/item/01261233}
}

Kiss, Elemér. A short proof of Fermat's two-square theorem given by János Bolyai.. Mathematica Pannonica, Tome 8 (1997) pp. 293-295. http://gdmltest.u-ga.fr/item/01261233/