@book { KnowledgebasedEconomies,
    title = "Knowledge-based Economies",
    subtitle = "Models and Methods",
    author = "Wladyslaw {Welfe}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106510"
}