Skowron-Grabowska, Beata, and Monika Osyra. “USABILITY OF INTANGIBLE RESOURCES IN LOGISTICS CENTRES STRATEGY ”. Advanced Logistic Systems - Theory and Practice, vol. 7, no. 1, July 2013, pp. 79-84, https://als.uni-miskolc.hu/index.php/als/article/view/98.