@book { PraktischeParasitologiebeiHeimtieren,
    title = "Praktische Parasitologie bei Heimtieren",
    author = "Wieland {Beck} and Nikola {Pantchev}",
    year = "2012",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403771"
}