@article{MAN_1989__283_1_164496,
     author = {D. M\"uller and H. Hueber},
     title = {Asymptotics for some {Green} {Kernels} on the {Heisenberg} {Group} and the {Martin} {Boundary.}},
     journal = {Mathematische Annalen},
     pages = {97--120},
     year = {1989},
     volume = {283},
     number = {1},
     zbl = {0639.31005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164496/}
}