@article{10_1090_S0894_0347_1989_0973308_2,
     author = {Zimmer, Robert J.},
     title = {Representations of fundamental groups of manifolds with a semisimple transformation group},
     journal = {Journal of the American Mathematical Society},
     pages = {201--213},
     publisher = {mathdoc},
     volume = {02},
     number = {2},
     year = {1989},
     doi = {10.1090/S0894-0347-1989-0973308-2},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1989-0973308-2/}
}