@article{JLT_2006_16_2_JLT_2006_16_2_a8,
     author = {V. Fischer },
     title = {The {Bounded} {Spherical} {Functions} on the {Free} {Two-Step} {Nilpotent} {Lie} {Group}},
     journal = {Journal of Lie theory},
     pages = {351--37},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/JLT_2006_16_2_JLT_2006_16_2_a8/}
}