@book { VerhaltensproblemebeimHund,
    title = "Verhaltensprobleme beim Hund",
    author = "Patricia {Solms}",
    year = "2020",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/520221"
}