@article{GDZPPN002486644,
title = {A Note on the Amenable Subgroups of PSL (2, R).},
journal = {Monatshefte f\"ur Mathematik},
volume = {108},
year = {1989},
pages = {241-244},
zbl = {0679.43008},
url = {http://dml.mathdoc.fr/item/GDZPPN002486644}
}
Nebbia, Claudio. A Note on the Amenable Subgroups of PSL (2, R).. Monatshefte für Mathematik, Tome 108 (1989) pp. 241-244. http://gdmltest.u-ga.fr/item/GDZPPN002486644/