@article{01215962,
title = {Lifting Witt subgroups to characteristic zero.},
journal = {The New York Journal of Mathematics [electronic only]},
volume = {3A},
year = {1998},
pages = {127-136},
zbl = {0919.14030},
language = {en},
url = {http://dml.mathdoc.fr/item/01215962}
}
Koch, Alan. Lifting Witt subgroups to characteristic zero.. The New York Journal of Mathematics [electronic only], Tome 3A (1998) pp. 127-136. http://gdmltest.u-ga.fr/item/01215962/