Cieślik, Andrzej, Anna Michałek, and Jan Jakub Michałek. “European Integration and firm’s Export Performance in the New EU Member Countries”. Economics and Business Review 14, no. 4 (December 30, 2014): 38–53. Accessed July 5, 2025. https://www.journals.ue.poznan.pl/ebr/article/view/837.