Dettmann E., Dominguez LacasaI., Günther J., and Jindra B. “Determinants of Foreign Technological Activity in German Regions – A Count Model Analysis of Transnational Patents”. Foresight and STI Governance, Vol. 8, no. 1, Feb. 2014, pp. 34-51, https://vo.hse.ru/index.php/foresight-journal/article/view/19659.