@article{JRAM_1997__492_153952,
     author = {Roelof W. Bruggeman},
     title = {Automorphic forms, hyperfunction cohomology, and period functions.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--40},
     publisher = {mathdoc},
     volume = {492},
     year = {1997},
     zbl = {0914.11023},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1997__492_153952/}
}