@article{GDZPPN00220701X,
title = {On Riesz means of eigenfunction expansions for the Kohn-Laplacian.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {394},
year = {1989},
pages = {113-121},
zbl = {0697.35102},
url = {http://dml.mathdoc.fr/item/GDZPPN00220701X}
}
Müller, Detlef. On Riesz means of eigenfunction expansions for the Kohn-Laplacian.. Journal für die reine und angewandte Mathematik, Tome 394 (1989) pp. 113-121. http://gdmltest.u-ga.fr/item/GDZPPN00220701X/