@book { EntrapmentinKonflikten,
    title = "Entrapment in Konflikten",
    subtitle = "Konfliktinvestitionen als Eskalationsrisiko",
    author = "Ludger {Haller} and Katrin {Milde}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095902"
}