@book { MdchenundMathematik,
    title = "Mädchen und Mathematik",
    author = "Mihriban {Bal}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842804876",
    url = "https://m.diplom.de/document/228063"
}