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25 Jahre Vertrag von Maastricht : Startpunkt für das heutige Europa
Anderheiden, Michael, (2018)
Subsidiarity principle : its realization in self-government in Lithuania and Poland
Gawłowski, Robert, (2020)
The trade-off between enlarging and deepening
Schäfer, Wolf, (2007)
The principle of subsidiarity and the transition of the welfare states in Central and Eastern Europe
Czéh, Tibor, (1997)