@book { RusslandundEuropa,
    title = "Russland und Europa",
    subtitle = "Facetten einer Beziehung",
    author = "Alexander {Trunk}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b12340",
    url = "https://www.peterlang.com/document/1061455"
}