@book { FormFunctionandVariationinEnglish,
    title = "Form, Function and Variation in English",
    author = "Uwe {Carls} and Peter {Lucko}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1087859"
}