@article{GDZPPN002206889,
title = {Eichler cohomology and periods of modular forms on p-adic Schottky groups.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {394},
year = {1989},
pages = {3-31},
zbl = {0674.14031},
url = {http://dml.mathdoc.fr/item/GDZPPN002206889}
}
Shalit, Ehud de. Eichler cohomology and periods of modular forms on p-adic Schottky groups.. Journal für die reine und angewandte Mathematik, Tome 394 (1989) pp. 3-31. http://gdmltest.u-ga.fr/item/GDZPPN002206889/