@book { CarlStangenTourismuspionierundSchriftsteller,
    title = "Carl Stangen – Tourismuspionier und Schriftsteller",
    author = "Alina {Dittmann}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b11427",
    url = "https://www.peterlang.com/document/1049190"
}