@article{GDZPPN002329182,
title = {The Dirichlet Problem for Sublaplacians on Nilpotent Gruops - Geometric Criteria For Regularity.},
journal = {Mathematische Annalen},
volume = {275},
year = {1986},
pages = {537-548},
zbl = {0601.31007},
url = {http://dml.mathdoc.fr/item/GDZPPN002329182}
}
Hansen, W.; Hueber, H. The Dirichlet Problem for Sublaplacians on Nilpotent Gruops - Geometric Criteria For Regularity.. Mathematische Annalen, Tome 275 (1986) pp. 537-548. http://gdmltest.u-ga.fr/item/GDZPPN002329182/