@book { DieZurechnungvonBuchgutschriften,
    title = "Die Zurechnung von Buchgutschriften",
    author = "Eva {Ullrich}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097380"
}