@article{JLT_2013_23_2_JLT_2013_23_2_a1,
     author = {G. Cicogna and G. Gaeta and S. Walcher },
     title = {Orbital {Reducibility} and a {Generalization} of {Lambda} {Symmetries}},
     journal = {Journal of Lie theory},
     pages = {357--381},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {2013},
     url = {http://geodesic.mathdoc.fr/item/JLT_2013_23_2_JLT_2013_23_2_a1/}
}