Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1980__35_141243, author = {Detlef Laugwitz}, title = {Quadratsummen in {Restklassenringen.}}, journal = {Elemente der Mathematik}, pages = {73--79}, publisher = {mathdoc}, volume = {35}, year = {1980}, zbl = {0441.10003}, url = {http://geodesic.mathdoc.fr/item/ELMA_1980__35_141243/} }
Detlef Laugwitz. Quadratsummen in Restklassenringen.. Elemente der Mathematik, Tome 35 (1980), pp. 73-79. http://geodesic.mathdoc.fr/item/ELMA_1980__35_141243/