ALBU1, L.-L. ., LUPU, . R. ., & Cantemir CALIN, A. . (2020). A Model to Simulate the Convergence Process in the EU and in the Balkans Region Based on Empirical Evidence . KnE Social Sciences, 4(1), 116–128. https://doi.org/10.18502/kss.v4i1.5983