@article{PPN481110151_0003+dmdlog11,
title = {Harmonic Differential Operators.},
journal = {Forum mathematicum},
volume = {3},
year = {1991},
pages = {177-204},
zbl = {0719.58040},
url = {http://dml.mathdoc.fr/item/PPN481110151_0003+dmdlog11}
}
Schimming, Rainer. Harmonic Differential Operators.. Forum mathematicum, Tome 3 (1991) pp. 177-204. http://gdmltest.u-ga.fr/item/PPN481110151_0003+dmdlog11/