Miremadi, Iman, and Yadollah Saboohi. “Planning for Investment in Energy Innovation: Developing an Analytical Tool to Explore the Impact of Knowledge Flow”. International Journal of Energy Economics and Policy, vol. 8, no. 2, Mar. 2018, pp. 7-19, https://econjournals.net.tr/index.php/ijeep/article/view/6020.