@book { FreiherrUlrichvonderHorstDieSchlachtvonIdstedt,
    title = "Freiherr Ulrich von der Horst - Die Schlacht von Idstedt",
    author = "Thomas {Rohwer} and Ulrich {Freiherr von der Horst}",
    year = "2022",
    publisher = "Die Maritime Bibliothek",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1167900"
}