1. Baumann K.: On the two-point functions of interacting Wightman fields. J. Math. Phys. 27, 828–831 (1986)
2. Bernard C., Duncan A., LoSecco J., Weinberg S.: Exact spectral-function sum rules. Phys. Rev. D12, 792–804 (1975)
3. Bostelmann, H., D’Antoni, C., Morsella, G.: Work in progress
4. Boerner H.: Representations of Groups. North-Holland, Amsterdam (1963)
5. Bostelmann, H.: Lokale Algebren und Operatorprodukte am Punkt. Thesis, Universität Göttingen (2000). Available online at http://webdoc.sub.gwdg.de/diss/2000/bostelmann/