Kourtit, Karima, Peter Nijkamp, and Soushi Suzuki. “Effective Clusters As Territorial Performance Engines in a Regional Development Strategy - A Triple-Layer DEA Assessment of the Aviation Valley in Poland”. REGION 4, no. 3 (August 22, 2017): 39–63. Accessed November 24, 2024. https://openjournals.wu-wien.ac.at/ojs/index.php/region/article/view/166.