@misc{DierckeArltDenker2019,
  author    = {Andrea Diercke and Rainer Arlt and Carsten Denker},
  title     = {Digitization of Sp{\"o}rer's sunspot drawings},
  booktitle = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe},
  number    = {577},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-41392},
  institution = {Mathematisch-Naturwissenschaftliche Fakult{\"a}t},
  series    = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {577},
  type      = {postprint},
  pages     = {63 -- 64},
  year        = {2019},
}