@book{JankeWuttkeAlpersetal.2005,
  author    = {Thomas Janke and Hans Wuttke and Karsten Alpers and Thomas Jahnke and Martin Janßen and Angelika Siekmann and Ursula Simanowsky},
  title     = {Fokus Mathematik ; Analytische Geometrie Lineare Algebra ; Gymnasiale Oberstufe ; Baden-W{\"u}rttemberg},
  editor    = {Thomas Janke and Hans Wuttke},
  isbn      = {3-464-57340-0},
  year      = {2005},
}