@book { HopeinTimesofWar,
    title = "Hope in Times of War",
    subtitle = "A Theological Ethic of Contemporary Conflict",
    author = "David E. {Roberts}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    url = "https://www.peterlang.com/document/1096538"
}