@book { DerMenschundseineWelt,
    title = "Der Mensch und seine Welt",
    author = "Abraham {Ehrlich}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03266-6",
    url = "https://www.peterlang.com/document/1046558"
}