@article{10_4171_dm_121,
     author = {B. Mirzaii and W. van der Kallen},
     title = {Homology stability for unitary groups},
     journal = {Documenta mathematica},
     pages = {143--166},
     year = {2002},
     volume = {7},
     doi = {10.4171/dm/121},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/121/}
}