@book { CastlesasEuropeanPhenomena,
    title = "Castles as European Phenomena",
    subtitle = "Towards an international approach to medieval castles in Europe. Contributions to an international and interdisciplinary workshop in Kiel, February 2016",
    author = "Stefan {Magnussen} and Daniel {Kossack}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-07274-7",
    url = "https://www.peterlang.com/document/1050670"
}