@article{IM_1984__77_143145,
     author = {M. Kashiwara and T. Tanisaki},
     title = {The characteristic cycles of holonomic systems on a flag manifold.},
     journal = {Inventiones mathematicae},
     pages = {185--198},
     publisher = {mathdoc},
     volume = {77},
     year = {1984},
     zbl = {0611.22008},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__77_143145/}
}