@article{Hartsoeker2008,
  author    = {Nikolaus Hartsoeker},
  title     = {Nova methodus utendi vel maximis vitris objectivis},
  url       = {http://edoc.bbaw.de/oa/series/reSA1LVCopqgE/PDF/20ke7Cp7QxuRc.pdf},
  year      = {2008},
}