@article{Komornicki_2012, title={EXTERNAL BORDER OF THE EUROPEAN UNION – PERMEABILITY, CO-OPERATION, PERSPECTIVES}, url={https://discussionpapers.rkk.hu/index.php/DP/article/view/2379}, number={Special}, journal={Discussion Papers}, author={Komornicki, Tomasz}, year={2012}, month={Jul.}, pages={89–103} }