@article{1102689796, author = {Malm, D. R.}, title = {Simplicity of partial and Schmidt differential operator rings.}, journal = {Pacific J. Math.}, volume = {135}, number = {2}, year = {1988}, pages = { 85-112}, language = {en}, url = {http://dml.mathdoc.fr/item/1102689796} }
Malm, D. R. Simplicity of partial and Schmidt differential operator rings.. Pacific J. Math., Tome 135 (1988) no. 2, pp. 85-112. http://gdmltest.u-ga.fr/item/1102689796/