@article{EMJ_2011_2_1_a4,
     author = {S. S. Ibraev},
     title = {On the second cohomology groups of exceptional {Lie} algebras in positive characteristic},
     journal = {Eurasian mathematical journal},
     pages = {104--111},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2011_2_1_a4/}
}