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@article{MAN_1989__284_4_164578, author = {Jeremy Teitelbaum}, title = {On {Drinfeld's} universal formal group over the p-adic upper half plane.}, journal = {Mathematische Annalen}, pages = {647--674}, publisher = {mathdoc}, volume = {284}, number = {4}, year = {1989}, zbl = {0682.14032}, url = {http://geodesic.mathdoc.fr/item/MAN_1989__284_4_164578/} }
Jeremy Teitelbaum. On Drinfeld's universal formal group over the p-adic upper half plane.. Mathematische Annalen, Tome 284 (1989) no. 4, pp. 647-674. http://geodesic.mathdoc.fr/item/MAN_1989__284_4_164578/