@book { AlexandervonHumboldtDierussischenSchriften,
    title = "Alexander von Humboldt: Die russischen Schriften",
    author = "Oliver {Lubrich} and Thomas {Nehrlich}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18524",
    url = "https://www.peterlang.com/document/1111773"
}