@book { DieNacherzhlformenimBulgarischen,
    title = "Die Nacherzählformen im Bulgarischen",
    author = "Penka {Ziegerer}",
    year = "1994",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12395",
    url = "https://www.peterlang.com/document/1066879"
}