@article{MZ_1992__210_1_174427,
     author = {Detlev Poguntke},
     title = {Invariant cones in solvable {Lie} algebras.},
     journal = {Mathematische Zeitschrift},
     pages = {661--674},
     year = {1992},
     volume = {210},
     number = {1},
     zbl = {0758.17007},
     url = {http://geodesic.mathdoc.fr/item/MZ_1992__210_1_174427/}
}