@online{thalesRectangle,
  author  = "Kmhkmh",
  title   = "Beweis mit Vervollständigung zum Rechteck",
  year    = "2015",
  urlseen = "27-05-24",
  url     = "https://de.wikipedia.org/wiki/Datei:Thales_theorem_by_refelection1.svg",
  note    = "Datei: \ttfamily{Thales theorem by refelection1.svg}",
}

@online{LPP-GY-M_750-5-A_IchDuWirThaleskreis,
  author  = "ISB",
  title   = "Der Thaleskreis",
  year    = "2020",
  urlseen = "28-05-24",
  url     = "https://www.lehrplanplus.bayern.de/sixcms/media.php/71/LPP-GY-M_750-5-A_IchDuWirThaleskreis.pdf",
  % note    = "Datei: \ttfamily{verb|LPP-GY-M_750-5-A_IchDuWirThaleskreis.pdf|}",
}

@book{cornelsen2019fokus,
  title = {Fokus Mathematik 7 Gymnasium Bayern},
  author = {Almer, Johannes and
            Dr. Briner, Gerd and
            Block, Jan and
            Dr. Christmann, Norbert and
            Distel, Brigitte and
            Dörr, Jochen 
           },
  year = {2019},
  publisher = {Cornelsen Verlag},
  address = {Berlin},
  isbn = {978-3-12-733071-7},
}

@book{LS7,
  title = {Lambacher Schweizer Mathematik 7},
  author = {},
  year = {2017},
  publisher = {Klett},
  isbn = {978-3-12-733071-7},
}