@book { DieJapanpolitikderDDR,
    title = "Die Japanpolitik der DDR",
    author = "Shogo {Akagawa}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16365",
    url = "https://www.peterlang.com/document/1111322"
}