@book { SymbolonBand20,
    title = "Symbolon - Band 20",
    subtitle = "Gesellschaft für wissenschaftliche Symbolforschung e. V., Jahrbuch Band 20. Neue Folge",
    author = "Hermann {Jung}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b10606",
    url = "https://www.peterlang.com/document/1113183"
}