@book { TranscriptionoftheSticheraIdiomelafortheMonthofAprilfromRussianManuscriptsfromthe12thCentury,
    title = "Transcription of the Stichera Idiomela for the Month of April from Russian Manuscripts from the 12th Century",
    author = "Nina K. {Ulff-Möller}",
    year = "1989",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12804",
    url = "https://www.peterlang.com/document/1067187"
}