GÓRNA, Joanna, GÓRNA, Karolina and SZULC, Elżbieta. Analysis of β-Convergence. From Traditional Cross-Section Model to Dynamic Panel Model. Dynamic Econometric Models. Online. 12 December 2013. Vol. 13, pp. 127-144. [Accessed 2 July 2025]. DOI 10.12775/DEM.2013.007.