@book { GrammarbetweenNormandVariation,
    title = "Grammar between Norm and Variation",
    author = "Alexandra N. {Lenz} and Albrecht {Plewnia}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-00820-3",
    url = "https://www.peterlang.com/document/1044578"
}