@article{JRAM_1978__301_152018,
     author = {J. Baumgarte},
     title = {Das {Oszillator-Kepler} {Problem} und die {Lie-Algebra.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {59--76},
     publisher = {mathdoc},
     volume = {301},
     year = {1978},
     zbl = {0375.70005},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1978__301_152018/}
}