@article{GDZPPN002087146,
title = {Deformations and Liftings of Finite, Commutative Group Schemes.},
journal = {Inventiones mathematicae},
volume = {5},
year = {1968},
pages = {317-334},
zbl = {0179.49901},
url = {http://dml.mathdoc.fr/item/GDZPPN002087146}
}
OORT, F.; MUMFORD, D. Deformations and Liftings of Finite, Commutative Group Schemes.. Inventiones mathematicae, Tome 5 (1968) pp. 317-334. http://gdmltest.u-ga.fr/item/GDZPPN002087146/