@book { RadonundGesundheit,
    title = "Radon und Gesundheit",
    author = "Peter {Deetjen} and Albrecht {Falkenbach}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088922"
}