@article{1102946071,
author = {Aschbacher, Michael},
title = {A characterization of the unitary and symplectic groups over finite fields of characteristic at least $5$.},
journal = {Pacific J. Math.},
volume = {49},
number = {2},
year = {1973},
pages = { 5-26},
language = {en},
url = {http://dml.mathdoc.fr/item/1102946071}
}
Aschbacher, Michael. A characterization of the unitary and symplectic groups over finite fields of characteristic at least $5$.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 5-26. http://gdmltest.u-ga.fr/item/1102946071/