@book { VariationinCentralModals,
    title = "Variation in Central Modals",
    author = "Maurizio {Gotti} and Marina {Dossena} and Richard {Dury} and Roberta {Facchinetti}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1094800"
}