@book { NextGenerationNetworksServiceDeliveryandManagement,
    title = "Next Generation Networks – Service Delivery and Management",
    author = "Natalia {Kryvinska} and Christine {Strauß}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1107768"
}