Molinari, Benedetto, and José L. Torres. “Technological Sources of Economic Growth in Europe and the U.S.”. Technological and Economic Development of Economy 24, no. 3 (May 28, 2018): 1178-1199. Accessed February 7, 2025. https://mla.vilniustech.lt/index.php/TEDE/article/view/1687.