@article{GDZPPN002209497,
title = {Radix redux: Normal subgroups of symplectic groups.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {426},
year = {1992},
pages = {51-106},
zbl = {0739.20023},
url = {http://dml.mathdoc.fr/item/GDZPPN002209497}
}
Costa, Douglas L.; Keller, Gordon E. Radix redux: Normal subgroups of symplectic groups.. Journal für die reine und angewandte Mathematik, Tome 426 (1992) pp. 51-106. http://gdmltest.u-ga.fr/item/GDZPPN002209497/