@book { HenryDavidThoreausAesthetics,
    title = "Henry David Thoreau’s Aesthetics",
    subtitle = "A Modern Approach to the World",
    author = "Verena {Kerting}",
    year = "2006",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100203"
}