@book { DiebertragungderelterlichenSorgegem1671BGB,
    title = "Die Übertragung der elterlichen Sorge gemäß § 1671 BGB",
    author = "Anke {Bloch}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1094360"
}