@article{GDZPPN002333252,
title = {Harmonic spaces associated with parabolic and elliptic differential operators.},
journal = {Mathematische Annalen},
volume = {283},
year = {1989},
pages = {393-404},
zbl = {0664.31011},
url = {http://dml.mathdoc.fr/item/GDZPPN002333252}
}
Kröger, Pawel. Harmonic spaces associated with parabolic and elliptic differential operators.. Mathematische Annalen, Tome 283 (1989) pp. 393-404. http://gdmltest.u-ga.fr/item/GDZPPN002333252/