@book { WorldWarIIandTwoOccupations,
    title = "World War II and Two Occupations",
    author = "Anna {Wolff-Powęska} and Piotr {Forecki}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05533-7",
    url = "https://www.peterlang.com/document/1049340"
}