@article{JLT_1994_4_1_a4,
     author = {D. Arnal and J. Ludwig},
     title = {Sums of {Adjoint} {Orbits}},
     journal = {Journal of Lie theory},
     pages = {105--138},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {1994},
     url = {http://geodesic.mathdoc.fr/item/JLT_1994_4_1_a4/}
}