DettmannE., Dominguez LacasaI., GüntherJ., and JindraB. “Determinants of Foreign Technological Activity in German Regions – A Count Model Analysis of Transnational Patents”. Foresight and STI Governance, Vol. 8, no. 1, Mar. 2014, pp. 34-51, doi:10.17323/1995-459x.2014.1.34.51.