@book { NikolajFedorovStudienzuLebenWerkundWirkung,
    title = "Nikolaj Fedorov. Studien zu Leben, Werk und Wirkung",
    author = "Michael {Hagemeister}",
    year = "1989",
    publisher = "Biblion",
    address = ", Germany",
    url = "https://www.peterlang.com/document/1067327"
}