@book { DasWortTonVerhltnisimWerkvonLudwigvanBeethoven,
    title = "Das Wort-Ton-Verhältnis im Werk von Ludwig van Beethoven",
    author = "Małgorzata {Grajter}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15638",
    url = "https://www.peterlang.com/document/1057769"
}