@book{MallSpychigerVogeletal.2016,
  author    = {Peter Mall and Maria Spychiger and Rose Vogel and Julia Zerlik},
  title     = {European Music Portfolio (EMP) - Maths: 'Sounding Ways into Mathematics' : Arbeitsbuch f{\"u}r Lehrerinnen und Lehrer},
  year      = {2016},
}