@book { PostimplementierungsphasevonERPSystemeninUnternehmen,
    title = "Postimplementierungsphase von ERP-Systemen in Unternehmen",
    author = "Lars {Brehm}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098108"
}