@book { TheUnitedNationsandPeace,
    title = "The United Nations and Peace",
    subtitle = "The Evolution of an Organizational Concept",
    author = "C. Julia {Harfensteller}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108255"
}