@article{701489,
     title = {The graded representations of an affine Lie algebra},
     booktitle = {Proceedings of the Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1991},
     pages = {[155]-161},
     mrnumber = {MR1151901},
     zbl = {0761.17023},
     url = {http://dml.mathdoc.fr/item/701489}
}

Futorny, V. M. The graded representations of an affine Lie algebra, dans Proceedings of the Winter School "Geometry and Physics", GDML_Books,  (1991), pp. [155]-161. http://gdmltest.u-ga.fr/item/701489/