@book { BildungszielNachhaltigkeit,
    title = "Bildungsziel Nachhaltigkeit!?",
    author = "Sascha {Zinn}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02647-4",
    url = "https://www.peterlang.com/document/1047495"
}