@article{GDZPPN002308975, title = {The Restriction of a Representation of GL2(k) to GL2(o).}, journal = {Mathematische Annalen}, volume = {201}, year = {1973}, pages = {311-318}, zbl = {0253.20062}, url = {http://dml.mathdoc.fr/item/GDZPPN002308975} }
Casselman, William. The Restriction of a Representation of GL2(k) to GL2(o).. Mathematische Annalen, Tome 201 (1973) pp. 311-318. http://gdmltest.u-ga.fr/item/GDZPPN002308975/