@book { ZurgesundheitlichenSituationvonalleinerziehendenMttern,
    title = "Zur gesundheitlichen Situation von alleinerziehenden Müttern",
    author = "Franka {Wiechmann}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836607995",
    url = "https://m.diplom.de/document/225490"
}