@book { 111HighProteinRezepte,
    title = "111 High-Protein-Rezepte",
    author = "Martina {Amon}",
    year = "2020",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/924933"
}