@book { TopicandFocusMarkersinSpanishPortugueseandFrench,
    title = "Topic and Focus Markers in Spanish, Portuguese and French",
    author = "Anja {Hennemann}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17042",
    url = "https://www.peterlang.com/document/1059052"
}