@book { BarrierefreierTourismusunddieRolledesReisemittlers,
    title = "Barrierefreier Tourismus und die Rolle des Reisemittlers",
    author = "Sonja {Höglinger}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-00456-4",
    url = "https://www.peterlang.com/document/1044255"
}