@book { VonderMutterschaftzurElternschaft,
    title = "Von der Mutterschaft zur Elternschaft",
    author = "Britta {Hartmann}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16807",
    url = "https://www.peterlang.com/document/1058930"
}