Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1956__11_140653, author = {Franz Steiger}, title = {\"Uber die {Grundl\"osungen} der {Gleichung} a2 + b2 + c2 = d2.}, journal = {Elemente der Mathematik}, pages = {105--108}, publisher = {mathdoc}, volume = {11}, year = {1956}, zbl = {0070.03902}, url = {https://geodesic-test.mathdoc.fr/item/ELMA_1956__11_140653/} }
Franz Steiger. Über die Grundlösungen der Gleichung a2 + b2 + c2 = d2.. Elemente der Mathematik, Tome 11 (1956), pp. 105-108. https://geodesic-test.mathdoc.fr/item/ELMA_1956__11_140653/