@article{GDZPPN002338661,
title = {Intertwining differential operators and reducibility of generalized Verma modules.},
journal = {Mathematische Annalen},
volume = {295},
year = {1993},
pages = {309-324},
zbl = {0788.22020},
url = {http://dml.mathdoc.fr/item/GDZPPN002338661}
}
Huang, Jing-song. Intertwining differential operators and reducibility of generalized Verma modules.. Mathematische Annalen, Tome 295 (1993) pp. 309-324. http://gdmltest.u-ga.fr/item/GDZPPN002338661/