@book { LaddersofBeauty,
    title = "Ladders of Beauty",
    subtitle = "Hierarchical Pedagogy from Plato to Dante",
    author = "Wayne {Hugo}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1100678"
}