@book { SanktPetersburgderakkurateDeutsche,
    title = "Sankt Petersburg – «der akkurate Deutsche»",
    author = "Norbert {Franz} and Ljuba {Kirjuchina}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101285"
}