@article{MM2_1992__74_2_155692,
     author = {Alfredo Brega and Juan Tirao},
     title = {A {Transversality} property of a derivation of the universal enverloping algebra {U} (k), for {SO} (n,1) and {SU} (n,1).},
     journal = {Manuscripta mathematica},
     pages = {195--216},
     publisher = {mathdoc},
     volume = {74},
     number = {2},
     year = {1992},
     zbl = {0756.17005},
     url = {http://geodesic.mathdoc.fr/item/MM2_1992__74_2_155692/}
}