@article{2041,
author = {Piziak, Robert},
title = {Orthogonality-preserving transformations on quadratic spaces},
journal = {Portugaliae mathematica},
volume = {43},
year = {1985},
pages = {201-212},
zbl = {0595.15001},
mrnumber = {0886667},
language = {en},
url = {http://dml.mathdoc.fr/item/2041}
}
Piziak, Robert. Orthogonality-preserving transformations on quadratic spaces. Portugaliae mathematica, Tome 43 (1985) pp. 201-212. http://gdmltest.u-ga.fr/item/2041/