@article{IM_1985__80_143228,
     author = {George Lusztig and David Kazhdan},
     title = {Equivariant {K-theory} and representations of {Hecke} algebras. {II.}},
     journal = {Inventiones mathematicae},
     pages = {209--232},
     publisher = {mathdoc},
     volume = {80},
     year = {1985},
     zbl = {0613.22003},
     url = {http://geodesic.mathdoc.fr/item/IM_1985__80_143228/}
}