@book { CourageofFaith,
    title = "Courage of Faith",
    subtitle = "Dag Hammarskjöld’s Way in Quest of Negotiated Peace, Reconciliation and Meaning",
    author = "Paul R. {Nelson}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103572"
}