Fernandes, Silvia, Marisa Cesário, and Guilherme Castela. “Modern Innovation Challenges to Firms and Cities: The Case of Portugal”. Journal of Technology Management & Innovation 13, no. 2 (August 2, 2018): 33–42. Accessed January 28, 2022. https://www.jotmi.org/index.php/GT/article/view/2663.