@article{10_4171_dm_125,
     author = {Martin Olbrich},
     title = {$L^2$-invariants of locally symmetric spaces},
     journal = {Documenta mathematica},
     pages = {219--237},
     year = {2002},
     volume = {7},
     doi = {10.4171/dm/125},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/125/}
}