@book { ZurMethodikderUntersuchungltererslavischerschriftsprachlicherTexte,
    title = "Zur Methodik der Untersuchung älterer slavischer schriftsprachlicher Texte",
    author = "Anna {Kretschmer}",
    year = "1989",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12143",
    url = "https://www.peterlang.com/document/1066713"
}