“THE COMPETITIVE CONDITIONS ANALYSIS IN THE SECTOR BASED ON THE "PORTER’S” MODEL” (2018) Research Bulletins of the Faculty of Economic Sciences, 1(21), pp. 263–278. Available at: https://ezeszyty.wne.tu.koszalin.pl/index.php/zeszyty/article/view/71 (Accessed: 20 July 2025).