@article{CM_1992__83_3_347_0, author = {Borel, Armand and Prasad, Gopal}, title = {Values of isotropic quadratic forms at $S$-integral points}, journal = {Compositio Mathematica}, volume = {84}, year = {1992}, pages = {347-372}, mrnumber = {1175945}, zbl = {0777.11008}, language = {en}, url = {http://dml.mathdoc.fr/item/CM_1992__83_3_347_0} }
Borel, Armand; Prasad, Gopal. Values of isotropic quadratic forms at $S$-integral points. Compositio Mathematica, Tome 84 (1992) pp. 347-372. http://gdmltest.u-ga.fr/item/CM_1992__83_3_347_0/
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