@book{BieligSchulzDiepgenJahnke1995,
  author    = {Gisela Bielig-Schulz and R. Diepgen and Thomas Jahnke},
  title     = {Mathematik : 10. Schuljahr},
  editor    = {Wilhelm Kuypers and Josef Lauter and Hans Wuttke},
  year      = {1995},
}