@book { DasOpferimStrafverfahrensrecht,
    title = "Das Opfer im Strafverfahrensrecht",
    author = "Kai Michael {Helmken}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16459",
    url = "https://www.peterlang.com/document/1058628"
}