@book { AufUnendlichesbezogen,
    title = "Auf Unendliches bezogen",
    author = "Risto {Nurmela}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01709-0",
    url = "https://www.peterlang.com/document/1045954"
}