“Empirical Approaches Upon Pension Systems in Central and Eastern European Countries. Triangle Assessment: Free Movement of People, Labor Market and Population Health Features”. 2020. Studia Universitatis Vasile Goldiș Arad, Seria Științe Economice 30 (1): 1-21. https://publicatii.uvvg.ro/index.php/studiaeconomia/article/view/635.