Jakab, Nóra, and Bernadett Solymosi-Szekeres. 2023. “The Theoretical Issue of Social Security—International and European Perspectives”. In Sustainability Of The Social Security System: Demographic Challenges and Answers in Central Europe, edited by Nóra Jakab, 19–50. Legal Studies on Central Europe. https://doi.org/10.54171/2023.nj.sotsss_2.