@article{rosenthal1971ultra,
  author = {Rosenthal, Earl},
  interhash = {7f5f18ec222b203451971d7b8b99b5f1},
  intrahash = {7bb77fb29f01c59b5b6cc40e2cd6cb30},
  journal = {Journal of the Warburg and Courtauld Institutes},
  pages = {204-228},
  title = {Plus ultra, non plus ultra, and the Columnar Device of Emperor Charles V},
  volume = 34,
  year = 1971
}

@incollection{medick1999historisches,
  address = {Göttingen},
  author = {Medick, Hans},
  booktitle = {Zwischen Alltag und Katastrophe. Der Dreißigjährige Krieg aus der Nähe},
  editor = {von Krusenstjern, Benigna and Medick, Hans},
  interhash = {36f86534833f84cd02ea0a68f9b41e86},
  intrahash = {298c209b20a417ea4b7512818d22b28f},
  pages = {377-407},
  series = {Veröffentlichungen des Max-Planck-Instituts für Geschichte 148},
  title = {Historisches Ereignis und zeitgenössische Erfahrung: Die Eroberung und Zerstörung Magdeburgs 1631},
  year = 1999
}