@book { Lebensfragen,
    title = "Lebensfragen",
    author = "Gerhard {Droesser} and Michael {Hartlieb}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03406-6",
    url = "https://www.peterlang.com/document/1046975"
}