@article{JEMS_2015_17_7_a3,
     author = {Eva Bayer-Fluckiger},
     title = {Isometries of quadratic spaces},
     journal = {Journal of the European Mathematical Society},
     pages = {1629--1656},
     publisher = {mathdoc},
     volume = {17},
     number = {7},
     year = {2015},
     doi = {10.4171/jems/541},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/541/}
}