@book { ProblemeeinerUmweltpolitikmitAbgaben,
    title = "Probleme einer Umweltpolitik mit Abgaben",
    author = "Klaus {Eckhardt}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13745",
    url = "https://www.peterlang.com/document/1068330"
}