@article{IM2_1983_20_3_a0,
     author = {V. A. Abrashkin},
     title = {Group schemes of period~$p$},
     journal = {Izvestiya. Mathematics},
     pages = {411--433},
     year = {1983},
     volume = {20},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1983_20_3_a0/}
}