@book { VorlufigeUntersuchungenberdenbairischenBulgarenmordvon631632,
    title = "Vorläufige Untersuchungen über den bairischen Bulgarenmord von 631/632",
    author = "Heinrich {Kunstmann}",
    year = "1982",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12489",
    url = "https://www.peterlang.com/document/1066952"
}