@article{GDZPPN002440040, title = {Level and Pythagoras number of some geometric rings (Erratum).}, journal = {Mathematische Zeitschrift}, volume = {209}, year = {1992}, pages = {481-484}, zbl = {0773.11025}, url = {http://dml.mathdoc.fr/item/GDZPPN002440040} }
Mahé, Louis. Level and Pythagoras number of some geometric rings (Erratum).. Mathematische Zeitschrift, Tome 209 (1992) pp. 481-484. http://gdmltest.u-ga.fr/item/GDZPPN002440040/