@article{SIGMA_2008_4_a1,
     author = {Anatoliy U. Klimyk and Jiri Patera},
     title = {$E${-Orbit} {Functions}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2008},
     volume = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2008_4_a1/}
}