Fromhold-Eisebith, Martina, and Günter Eisebith. “Economic Crisis and Innovativeness – Exploring Geographies of Impact”. DIE ERDE – Journal of the Geographical Society of Berlin 142, no. 4 (October 1, 2011): 377–392. Accessed March 2, 2026. https://www.die-erde.org/index.php/die-erde/article/view/29.