@book { SexfrEinsteigerInnenworaufeswirklichankommt,
    title = "Sex für EinsteigerInnen - worauf es wirklich ankommt",
    author = "Jana {Kellermann}",
    year = "2023",
    publisher = "Phoenix Rising Publishers",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1359890"
}