@book { DieGrenzenderErkenntnisunddahinter,
    title = "Die Grenzen der Erkenntnis und dahinter",
    author = "Abraham {Ehrlich}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04864-3",
    url = "https://www.peterlang.com/document/1048862"
}