@article{MZ_1991__206_1_174234,
     author = {Helga Baum},
     title = {An upper bound for the first eigenvalue of the {Dirac} operator on compact spin manifolds.},
     journal = {Mathematische Zeitschrift},
     pages = {409--422},
     publisher = {mathdoc},
     volume = {206},
     number = {1},
     year = {1991},
     zbl = {0722.53036},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__206_1_174234/}
}