@article{Kuester2007,
  author    = {Georg Gottfried K{\"u}ster},
  title     = {Sur l'origine de la Maison de Zollern},
  url       = {http://edoc.bbaw.de/oa/series/reIiO4fw1MBA6/PDF/24WrTwQDEHa9o.pdf},
  year      = {2007},
}