@article{02186437, title = {Naturally graded }, journal = {Journal of Lie Theory}, volume = {15}, year = {2005}, pages = {379-391}, zbl = {1070.17003}, language = {en}, url = {http://dml.mathdoc.fr/item/02186437} }
Cabezas, J.M.; Pastor, E. Naturally graded . Journal of Lie Theory, Tome 15 (2005) pp. 379-391. http://gdmltest.u-ga.fr/item/02186437/