@book { ChancenundGrenzenvonSeniorengenossenschaftenamBeispielGttingen,
    title = "Chancen und Grenzen von Seniorengenossenschaften am Beispiel Göttingen",
    author = "Stephan {Wagner}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832401658",
    url = "https://m.diplom.de/document/216116"
}