@book { AspektevonGeschwisterBeziehungen,
    title = "Aspekte von Geschwister-Beziehungen",
    author = "Susanne {Behling}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832405977",
    url = "https://m.diplom.de/document/216531"
}