@article{01409631,
title = {A Lie transformation group attached to a second order elliptic operator.},
journal = {The New York Journal of Mathematics [electronic only]},
volume = {5},
year = {1999},
pages = {143-146},
zbl = {0955.58007},
language = {en},
url = {http://dml.mathdoc.fr/item/01409631}
}
Affane, Atallah. A Lie transformation group attached to a second order elliptic operator.. The New York Journal of Mathematics [electronic only], Tome 5 (1999) pp. 143-146. http://gdmltest.u-ga.fr/item/01409631/