@article{01184283, title = {Barsotti-Tate groups and crystals.}, journal = {Documenta Mathematica}, year = {1998}, pages = {259-265}, zbl = {0919.14029}, language = {en}, url = {http://dml.mathdoc.fr/item/01184283} }
de Jong, A.J. Barsotti-Tate groups and crystals.. Documenta Mathematica, (1998), pp. 259-265. http://gdmltest.u-ga.fr/item/01184283/