@book { HerausforderungDemenz,
    title = "Herausforderung Demenz",
    author = "Markus {Christen} and Corinna {Osman} and Ruth {Baumann-Hölzle}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/978-3-0351-0095-2",
    url = "https://www.peterlang.com/document/1052134"
}