@article{10_1090_S0894_0347_1993_1186962_0,
     author = {Kazhdan, D. and Lusztig, G.},
     title = {Tensor structures arising from affine {Lie} algebras. {II}},
     journal = {Journal of the American Mathematical Society},
     pages = {949--1011},
     publisher = {mathdoc},
     volume = {06},
     number = {4},
     year = {1993},
     doi = {10.1090/S0894-0347-1993-1186962-0},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1993-1186962-0/}
}