@article{GDZPPN002083787, title = {Global Dimension of Differential Operator Rings. IV - Simple Modules.}, journal = {Forum mathematicum}, volume = {1}, year = {1989}, pages = {185-200}, zbl = {0656.16001}, url = {http://dml.mathdoc.fr/item/GDZPPN002083787} }
Goodearl, Kenneth R. Global Dimension of Differential Operator Rings. IV - Simple Modules.. Forum mathematicum, Tome 1 (1989) pp. 185-200. http://gdmltest.u-ga.fr/item/GDZPPN002083787/