@book { GuineaLanguagesoftheAtlanticGroup,
    title = "Guinea Languages of the Atlantic Group",
    subtitle = "Description and Internal Classification",
    author = "Anne {Storch} and André {Wilson}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1102820"
}