@book { Verspannungenloswerden,
    title = "Verspannungen loswerden",
    author = "Tobias {Knop} and Daniel {Niehaus}",
    year = "2023",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/1390758"
}