@article{MZ_1973__131_171902,
     author = {Upke-Walther Schmincke},
     title = {A {Spectral} {Gap} {Theorem} for {Dirac} {Operators} with {Central} {Field.}},
     journal = {Mathematische Zeitschrift},
     pages = {351--356},
     publisher = {mathdoc},
     volume = {131},
     year = {1973},
     zbl = {0258.35054},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__131_171902/}
}