@book { EntwicklungvonKleinunternehmeninRuland,
    title = "Entwicklung von Kleinunternehmen in Rußland",
    author = "Barbara {Zschoch}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1087244"
}