Zs. Varga, András. “Foreword”. In Federalism As the Future of the Diverse EU?, edited by András Zs. Varga and Lilla Berkes, 19–22. Miskolc–Budapest: Studies of the Central European Professors’ Network, 2025. Accessed September 8, 2026. https://cea.omp.testing.qulto.eu:443/index.php/ceaprofnet/catalog/book/42/chapter/448.