@book { NewApproachestotheStudyofLinguisticVariability,
    title = "New Approaches to the Study of Linguistic Variability",
    author = "Markus {Bieswanger} and Amei {Koll-Stobbe}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03231-4",
    url = "https://www.peterlang.com/document/1045640"
}