@article{JLT_2010_20_3_JLT_2010_20_3_a2,
     author = {U. Bader },
     title = {Conformal {Actions} on {Homogeneous} {Lorentzian} {Manifolds}},
     journal = {Journal of Lie theory},
     pages = {469--481},
     year = {2010},
     volume = {20},
     number = {3},
     url = {http://geodesic.mathdoc.fr/item/JLT_2010_20_3_JLT_2010_20_3_a2/}
}