Sánchez, S. M. F., M. A. F. Segovia, and L. C. R. López. “Impact of Public Policies on the Technological Innovation in the Renewable Energy Sector”. International Journal of Energy Economics and Policy, vol. 10, no. 2, Jan. 2020, pp. 139-5, https://econjournals.com/index.php/ijeep/article/view/8864.