@book { IntegralFederalism,
    title = "Integral Federalism",
    subtitle = "Model for Europe - a way towards a personal group society- Historical development, Philosophy, State, Economy, Society",
    author = "Lutz {Roemheld}",
    year = "1990",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1077124"
}