Saavedra, David Paz, Marta De La Fuente, Xose Luis Fernandez, and Pablo Coto Millan. “R&D Investment: A Dynamic Efficiency Approach in the EU Countries”. The Economics and Finance Letters 11, no. 3 (August 13, 2024): 221–231. Accessed January 6, 2025. https://archive.conscientiabeam.com/index.php/29/article/view/3865.