
@Article{Hoppe1875,
  author =       "E. Hoppe",
  title =        "On the determination of the cardinal and focal points
                 of a system of lenses",
  journal =      "Pogg. Ann.",
  year =         "1875",
  volume =       "160",
  pages =        "168--174",
  ISSN =         "0003-3804",
  fjournal =     "Annalen der Physik und Chemie",
  jfm =          "09.0730.01",
  keywords =     "78A05",
  language =     "German",
  zbmath =       "2713376",
}