@book { 6thInternationalSecurityForum,
    title = "6 th  International Security Forum",
    subtitle = "Proceedings of the Conference",
    author = "Theodor H. {Winkler} and Anja H. {Ebnöther} and Ernst M. {Felberbauer}",
    year = "2005",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1098812"
}