@article{GDZPPN002332108,
title = {Asymptotics for some Green Kernels on the Heisenberg Group and the Martin Boundary.},
journal = {Mathematische Annalen},
volume = {283},
year = {1989},
pages = {97-120},
zbl = {0639.31005},
url = {http://dml.mathdoc.fr/item/GDZPPN002332108}
}
Müller, D.; Hueber, H. Asymptotics for some Green Kernels on the Heisenberg Group and the Martin Boundary.. Mathematische Annalen, Tome 283 (1989) pp. 97-120. http://gdmltest.u-ga.fr/item/GDZPPN002332108/