@article{Pott2007,
  author    = {Johann Heinrich Pott},
  title     = {Recherches sur la nature et les propri{\´e}t{\´e}s du Fiel de Verre},
  url       = {http://edoc.bbaw.de/oa/series/retgsZKa72qVo/PDF/22UZh6zEbQI.pdf},
  year      = {2007},
}