@article{JLT_2006_16_4_JLT_2006_16_4_a4,
     author = {Y. A. Bahturin and M. V. Zaicev },
     title = {Group {Gradings} on {Simple} {Lie} {Algebras} of {Type} {"A"}},
     journal = {Journal of Lie theory},
     pages = {719--742},
     publisher = {mathdoc},
     volume = {16},
     number = {4},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/JLT_2006_16_4_JLT_2006_16_4_a4/}
}