@article{GDZPPN002101068, title = {Zum Periodenproblem.}, journal = {Inventiones mathematicae}, volume = {75}, year = {1984}, pages = {381-392}, url = {http://dml.mathdoc.fr/item/GDZPPN002101068} }
Wüstholz, G. Zum Periodenproblem.. Inventiones mathematicae, Tome 75 (1984) pp. 381-392. http://gdmltest.u-ga.fr/item/GDZPPN002101068/