@book { AlleinerziehendMnnlichGut,
    title = "Alleinerziehend. Männlich. Gut.",
    author = "Armin {Fischer}",
    year = "2010",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403402"
}