@article{JLT_2014_24_2_JLT_2014_24_2_a1,
     author = {H. Ben Messaoud and G. Rousseau },
     title = {Kac-Moody {Lie} {Algebras} {Graded} by {Kac-Moody} {Root} {Systems}},
     journal = {Journal of Lie theory},
     pages = {321--35},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {2014},
     url = {http://geodesic.mathdoc.fr/item/JLT_2014_24_2_JLT_2014_24_2_a1/}
}