@book { EthikinFreiheit,
    title = "Ethik in Freiheit",
    author = "Paul R. {Tarmann}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06673-9",
    url = "https://www.peterlang.com/document/1049876"
}