Geodesic
On the Pythagoras number of orders in totally real number fields.
Journal für die reine und angewandte Mathematik, Tome 316 (1980), pp. 208-210.

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Mots-clés : Pythagoras number, sum of squares, non totally real algebraic number fields 
@article{JRAM_1980__316_152248,
     author = {Rudolf Scharlau},
     title = {On the {Pythagoras} number of orders in totally real number fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {208--210},
     publisher = {mathdoc},
     volume = {316},
     year = {1980},
     zbl = {0421.12017},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__316_152248/}
}
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Rudolf Scharlau. On the Pythagoras number of orders in totally real number fields.. Journal für die reine und angewandte Mathematik, Tome 316 (1980), pp. 208-210. http://geodesic.mathdoc.fr/item/JRAM_1980__316_152248/