@book { SterbenundTodbeiHochaltrigen,
    title = "Sterben und Tod bei Hochaltrigen",
    author = "Ortrun {Reidick}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05681-5",
    url = "https://www.peterlang.com/document/1049490"
}