@book { KooperativeRiskPoolingStrategienimModehandel,
    title = "Kooperative Risk-Pooling-Strategien im Modehandel",
    author = "Ulrich {Heil}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101613"
}