@article{01736443, title = {An invariant symmetric non-selfadjoint differential operator.}, journal = {Journal of Lie Theory}, volume = {12}, year = {2002}, pages = {245-257}, zbl = {1010.22017}, language = {en}, url = {http://dml.mathdoc.fr/item/01736443} }
Thomas, Erik G.F. An invariant symmetric non-selfadjoint differential operator.. Journal of Lie Theory, Tome 12 (2002) pp. 245-257. http://gdmltest.u-ga.fr/item/01736443/