@book { IntroductiontotheHistoryofEnglish,
    title = "Introduction to the History of English",
    author = "Thomas {Kohnen}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04171-2",
    url = "https://www.peterlang.com/document/1053630"
}