@book { MarianneWerefkinundderrussischeSymbolismus,
    title = "Marianne Werefkin und der russische Symbolismus",
    author = "Jelena {Hahl-Koch}",
    year = "1967",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12360",
    url = "https://www.peterlang.com/document/1066851"
}