Rodzinka, Jacek, and Tomasz Skica. “The Concept of Clustering and Benefits of Functioning As Part of a Cluster”. Regional Barometer. Analyses & Prognoses 13, no. 2 (July 17, 2015): 29–42. Accessed July 10, 2025. https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/859.