@article{JRAM_1989__400_153161,
     author = {Ehud de Shalit},
     title = {Eichler cohomology and periods of modular forms on p-adic {Schottky} groups.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {3--31},
     publisher = {mathdoc},
     volume = {400},
     year = {1989},
     zbl = {0674.14031},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1989__400_153161/}
}