@book { IvanMilevunddieZeitschriftVezni,
    title = "Ivan Milev und die Zeitschrift «Vezni»",
    author = "Rada {Bieberstein}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099429"
}