@book { CharlotteandEmilyBront,
    title = "Charlotte and Emily Brontë",
    author = "Esther {Schönberger-Schleicher}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1089233"
}