@book{MoellerHaneltHolubeketal.2005,
  author    = {Angelika M{\"o}ller and Martina Hanelt and Ines Holubek and Ramona Schmidt and Sabine Schmidt and Irina Schultheiß and Reinhard Stamm},
  title     = {Mathematik : Lehrbuch f{\"u}r die Klasse 6 ; Berlin / Brandenburg},
  isbn      = {3-89818-222-3},
  year      = {2005},
}