@book { DasNotationssystemvonHeinzMatyssek,
    title = "Das Notationssystem von Heinz Matyssek",
    author = "Lucyna {Krenz-Brzozowska}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03086-0",
    url = "https://www.peterlang.com/document/1047647"
}