@article{IM_1984__75_143100,
     author = {R. Hotta and M. Kashiwara},
     title = {The invariant holonomic system on a semisimple {Lie} algebra.},
     journal = {Inventiones mathematicae},
     pages = {327--358},
     publisher = {mathdoc},
     volume = {75},
     year = {1984},
     zbl = {0538.22013},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__75_143100/}
}