@book { TourismusbedingteUmweltgefahren,
    title = "Tourismusbedingte Umweltgefahren",
    subtitle = "Eignung umweltökonomischer Instrumente",
    author = "Katja {Mohr}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105170"
}