@article{JRAM_1996__471_153787,
     author = {J. Tolksdorf and Ackermann and T.},
     title = {The generalized {Lichnerowicz} formula and analysis of {Dirac} operators.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {23--42},
     publisher = {mathdoc},
     volume = {471},
     year = {1996},
     zbl = {0847.58074},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1996__471_153787/}
}