@article{GDZPPN002428210, title = {Wittringe h\"oherer Stufe.}, journal = {Mathematische Zeitschrift}, volume = {183}, year = {1983}, pages = {155-164}, zbl = {0499.10022}, url = {http://dml.mathdoc.fr/item/GDZPPN002428210} }
Carlsson, Renate. Wittringe höherer Stufe.. Mathematische Zeitschrift, Tome 183 (1983) pp. 155-164. http://gdmltest.u-ga.fr/item/GDZPPN002428210/