@article{IM2_1974_8_4_a2,
     author = {V. G. Kac},
     title = {Description of filtered {Lie} algebras with which graded {Lie} algebras of {Cartan} type are associated},
     journal = {Izvestiya. Mathematics },
     pages = {801--835},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1974_8_4_a2/}
}