@book { TierfotografieWildesDeutschland,
    title = "Tierfotografie „Wildes Deutschland“",
    author = "Radomir {Jakubowski}",
    year = "2021",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/1025323"
}