@book { TheLightoftheSoul,
    title = "The Light of the Soul",
    subtitle = "The ‘Lumen anime’ and Ulrich Putsch’s ‘Das liecht der sel’",
    author = "Nigel {Harris}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Oxford, United Kingdom",
    url = "https://www.peterlang.com/document/1102353"
}