Sułkowski, Łukasz, and Bartłomiej Stopczyński. “Innovativeness of Polish Enterprises in the Development of Competitive Advantage”. International Entrepreneurship Review 4, no. 3 (September 12, 2018): 373–388. Accessed May 15, 2025. https://ier.uek.krakow.pl/index.php/pm/article/view/1780.