@unpublished{MuellerKopper1999,
  author  = {Volkhard F. M{\"u}ller and Christoph Kopper},
  title   = {Renormalization Proof for Spontaneously broken Yang-Mills Theory with Flow Equations},
  institution = {Fachbereich Physik},
  year    = {1999},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-8737},
}