D. Borbely, «EU Export Specialization Patterns of Selected Accession and Cohesion Countries: Tough Competition on the EU15 Market?», Pap. este transic. poscomunistas, vol. 9, pp. 5–5, ene. 2004, Accedido: feb. 16, 2025. Disponible en: https://revistas.ucm.es/index.php/PAPE/article/view/PAPE0404220005A