@Misc{ 
  Olb15a,
  author = { Olbermann, Heiner },
  title = { Integrability of the Brouwer degree for irregular arguments },
  journal = {  },
  year = { 2015 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4386/ },
  note = { cvgmt preprint}
}