@article{IM_1993__113_2_144128,
     author = {M. Rapoport and U. Stuhler and G. Laumon},
     title = {D-elliptic sheaves and the {Langlands} correspondence.},
     journal = {Inventiones mathematicae},
     pages = {217--338},
     publisher = {mathdoc},
     volume = {113},
     number = {2},
     year = {1993},
     zbl = {0809.11032},
     url = {http://geodesic.mathdoc.fr/item/IM_1993__113_2_144128/}
}